Ring Value Calculator

Ring Value Calculator: Estimate Your Ring's Worth :root { –primary-color: #004a99; –success-color: #28a745; –background-color: #f8f9fa; –text-color: #333; –secondary-text-color: #666; –border-color: #ddd; –card-background: #fff; –shadow: 0 2px 5px rgba(0,0,0,0.1); } body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background-color: var(–background-color); color: var(–text-color); line-height: 1.6; margin: 0; padding: 0; display: flex; flex-direction: column; align-items: center; } .container { width: 100%; max-width: 960px; margin: 20px auto; padding: 20px; background-color: var(–card-background); border-radius: 8px; box-shadow: var(–shadow); } header { background-color: var(–primary-color); color: white; padding: 20px 0; text-align: center; width: 100%; margin-bottom: 20px; } header h1 { margin: 0; font-size: 2.5em; } .calculator-section { margin-bottom: 40px; padding: 30px; border: 1px solid var(–border-color); border-radius: 8px; background-color: var(–card-background); box-shadow: var(–shadow); } .calculator-section h2 { color: var(–primary-color); text-align: center; margin-top: 0; margin-bottom: 25px; font-size: 1.8em; } .loan-calc-container { display: flex; flex-direction: column; gap: 20px; } .input-group { display: flex; flex-direction: column; gap: 8px; } .input-group label { font-weight: bold; color: var(–primary-color); } .input-group input[type="number"], .input-group select { padding: 12px; border: 1px solid var(–border-color); border-radius: 4px; font-size: 1em; box-sizing: border-box; } .input-group input[type="number"]:focus, .input-group select:focus { outline: none; border-color: var(–primary-color); box-shadow: 0 0 0 2px rgba(0, 74, 153, 0.2); } .input-group .helper-text { font-size: 0.85em; color: var(–secondary-text-color); } .error-message { color: red; font-size: 0.85em; margin-top: 5px; display: none; /* Hidden by default */ } .button-group { display: flex; gap: 15px; margin-top: 25px; justify-content: center; flex-wrap: wrap; } .button-group button { padding: 12px 25px; border: none; border-radius: 5px; font-size: 1em; font-weight: bold; cursor: pointer; transition: background-color 0.3s ease, transform 0.2s ease; } .button-group button:hover { transform: translateY(-2px); } .btn-calculate { background-color: var(–primary-color); color: white; } .btn-calculate:hover { background-color: #003366; } .btn-reset { background-color: #6c757d; color: white; } .btn-reset:hover { background-color: #5a6268; } .btn-copy { background-color: var(–success-color); color: white; } .btn-copy:hover { background-color: #218838; } #results-container { margin-top: 30px; padding: 25px; border: 1px solid var(–border-color); border-radius: 8px; background-color: var(–card-background); box-shadow: var(–shadow); text-align: center; } #results-container h3 { color: var(–primary-color); margin-top: 0; font-size: 1.6em; } .primary-result { font-size: 2.5em; font-weight: bold; color: var(–success-color); margin: 15px 0; padding: 15px; background-color: #e9ecef; border-radius: 5px; display: inline-block; } .intermediate-results { display: flex; justify-content: space-around; flex-wrap: wrap; margin-top: 20px; gap: 15px; } .intermediate-results div { text-align: center; padding: 10px; border: 1px dashed var(–border-color); border-radius: 5px; background-color: #fdfdfd; flex: 1; min-width: 150px; } .intermediate-results span { display: block; font-weight: bold; font-size: 1.3em; color: var(–primary-color); } .formula-explanation { font-size: 0.9em; color: var(–secondary-text-color); margin-top: 20px; padding: 10px; background-color: #f0f0f0; border-radius: 4px; } table { width: 100%; border-collapse: collapse; margin-top: 25px; box-shadow: var(–shadow); } th, td { padding: 12px 15px; text-align: left; border: 1px solid var(–border-color); } thead { background-color: var(–primary-color); color: white; } tbody tr:nth-child(even) { background-color: #f2f2f2; } caption { font-size: 1.1em; font-weight: bold; color: var(–primary-color); margin-bottom: 10px; text-align: left; } canvas { margin-top: 25px; border: 1px solid var(–border-color); border-radius: 5px; background-color: var(–card-background); } .chart-container { text-align: center; margin-top: 25px; padding: 20px; background-color: var(–card-background); border-radius: 8px; box-shadow: var(–shadow); } .chart-container h3 { margin-top: 0; color: var(–primary-color); } .article-content { margin-top: 40px; padding: 30px; background-color: var(–card-background); border-radius: 8px; box-shadow: var(–shadow); text-align: left; } .article-content h2, .article-content h3 { color: var(–primary-color); margin-top: 30px; margin-bottom: 15px; } .article-content h2 { font-size: 2em; border-bottom: 2px solid var(–primary-color); padding-bottom: 5px; } .article-content h3 { font-size: 1.5em; } .article-content p { margin-bottom: 15px; } .article-content ul, .article-content ol { margin-left: 20px; margin-bottom: 15px; } .article-content li { margin-bottom: 8px; } .article-content a { color: var(–primary-color); text-decoration: none; font-weight: bold; } .article-content a:hover { text-decoration: underline; } .faq-item { margin-bottom: 15px; padding: 10px; border-left: 3px solid var(–primary-color); background-color: #fefefe; border-radius: 4px; } .faq-item strong { color: var(–primary-color); display: block; margin-bottom: 5px; } .related-links ul { list-style: none; padding: 0; } .related-links li { margin-bottom: 10px; } .related-links a { font-weight: bold; } .related-links span { font-size: 0.9em; color: var(–secondary-text-color); display: block; margin-top: 3px; } footer { text-align: center; padding: 20px; margin-top: 40px; width: 100%; background-color: var(–primary-color); color: white; font-size: 0.9em; } @media (min-width: 768px) { .container { padding: 30px; } .calculator-section, #results-container, .chart-container, .article-content { padding: 40px; } .button-group { justify-content: center; } }

Ring Value Calculator

Estimate the current market value of your ring

Ring Valuation Tool

Gold Platinum Silver Palladium Select the primary metal of the ring.
For gold: 10K, 14K, 18K, 24K. For platinum/silver: fineness (e.g., 950, 925). Enter numeric value (e.g., 14 for 14K, 925 for 925 silver).
Enter the total weight of the metal in grams.
Diamond Ruby Sapphire Emerald Other Precious Semi-Precious None Select the type of the primary gemstone.
Enter the total carat weight of the main gemstone.
Rate the gemstone's quality (color, clarity, cut) on a scale of 0 to 10. Higher is better.
Rate the uniqueness and quality of the ring's design and manufacturing on a scale of 1 to 5.

Estimated Ring Value

$0.00
$0.00

Metal Value

$0.00

Gemstone Value

$0.00

Craftsmanship Value

Formula Used: Estimated Value = (Metal Weight * Current Metal Price * Purity Factor) + (Gemstone Carat * Gemstone Base Price * Quality Factor) + (Craftsmanship Factor * Base Craftsmanship Cost)

Value Breakdown

Key Assumptions
Assumption Value
Current Gold Price (per gram) $0.00
Current Platinum Price (per gram) $0.00
Current Silver Price (per gram) $0.00
Diamond Base Price (per carat) $0.00
Other Precious Base Price (per carat) $0.00
Semi-Precious Base Price (per carat) $0.00
Base Craftsmanship Cost $0.00

What is a Ring Value Calculator?

A Ring Value Calculator is an online tool designed to provide an estimated current market value for a ring. It takes into account various components that contribute to a ring's worth, such as the type and weight of the metal, the characteristics of any gemstones, and the overall craftsmanship and design. This calculator is particularly useful for individuals looking to understand the potential resale value, insurance appraisal value, or simply the intrinsic worth of their jewelry.

Who should use it?

  • Jewelry owners curious about their ring's value.
  • Individuals considering selling a ring.
  • People needing to insure their jewelry and seeking a baseline value.
  • Those interested in learning more about the factors that influence jewelry pricing.

Common Misconceptions:

  • Perceived Value vs. Market Value: A ring's sentimental value or the original purchase price doesn't always equate to its current market or resale value. Market value is driven by current material prices, demand, and condition.
  • Gemstone Price = Retail Price: The calculator estimates a value based on material and quality factors. Retail prices often include significant markups for branding, retail overhead, and profit margins, which are not reflected in a resale or material value estimate.
  • One-Size-Fits-All Pricing: Jewelry valuation is complex. This calculator provides an estimate based on common factors, but unique antique pieces, designer brands, or exceptionally rare gemstones may require expert appraisal.

Ring Value Calculator Formula and Mathematical Explanation

The Ring Value Calculator employs a multi-faceted formula to estimate a ring's worth. It breaks down the value into three primary components: the metal's value, the gemstone's value, and the craftsmanship's value. Each component is calculated based on specific inputs and current market data.

Step-by-Step Derivation:

  1. Metal Value Calculation: This is determined by the weight of the metal, its purity, and the current market price of that metal. A purity factor adjusts the price based on the percentage of pure metal in the alloy.
  2. Gemstone Value Calculation: This component considers the gemstone's type, its total carat weight, and a quality factor that reflects its color, clarity, cut, and overall appeal. Different gemstone types have vastly different base price points.
  3. Craftsmanship Value Calculation: This factor accounts for the artistry, design complexity, and manufacturing quality of the ring. It's often represented as a multiplier or an added value based on a subjective rating.
  4. Total Estimated Value: The final estimated value is the sum of the calculated Metal Value, Gemstone Value, and Craftsmanship Value.

Variable Explanations:

  • Metal Type: The primary metal used (e.g., Gold, Platinum, Silver).
  • Metal Purity: The proportion of pure metal in the alloy, often expressed in karats (e.g., 14K, 18K) or fineness (e.g., 925 for Sterling Silver, 950 for Platinum).
  • Metal Weight: The total mass of the metal in the ring, measured in grams.
  • Gemstone Type: The classification of the main gemstone (e.g., Diamond, Ruby, Sapphire).
  • Gemstone Carat Weight: The weight of the gemstone, measured in carats.
  • Gemstone Quality Factor: A subjective score (0-10) representing the gemstone's visual appeal, considering color, clarity, cut, and brilliance.
  • Craftsmanship Factor: A subjective score (1-5) reflecting the ring's design uniqueness, intricacy, and manufacturing quality.
  • Current Metal Prices: Real-time or recent average market prices for gold, platinum, and silver per gram.
  • Gemstone Base Prices: Average market prices for different gemstone types per carat, varying significantly by type and quality.
  • Base Craftsmanship Cost: A baseline cost attributed to the labor and design involved in creating the ring.

Variables Table:

Variable Meaning Unit Typical Range
Metal Type Primary metal composition Categorical Gold, Platinum, Silver, Palladium
Metal Purity Proportion of pure metal Karat (K) or Fineness (‰) 10K-24K, 925, 950
Metal Weight Mass of the metal Grams (g) 0.5g – 30g+
Gemstone Type Classification of the main stone Categorical Diamond, Ruby, Sapphire, Emerald, etc.
Gemstone Carat Weight Weight of the gemstone Carats (ct) 0ct – 10ct+
Gemstone Quality Factor Visual appeal score Scale 0-10 0 – 10
Craftsmanship Factor Design & manufacturing quality score Scale 1-5 1 – 5
Current Metal Price Market price per unit weight USD/g Varies daily (e.g., Gold: $40-$70/g)
Gemstone Base Price Market price per carat USD/ct Varies widely (e.g., Diamond: $1,000-$10,000+/ct)
Base Craftsmanship Cost Standard cost for labor/design USD $50 – $1000+

Practical Examples (Real-World Use Cases)

Let's illustrate how the Ring Value Calculator works with practical examples:

Example 1: Engagement Ring

Inputs:

  • Metal Type: Gold
  • Metal Purity: 14K (equivalent to 58.5% pure gold)
  • Metal Weight: 4.5 grams
  • Main Gemstone Type: Diamond
  • Main Gemstone Carat Weight: 1.2 carats
  • Gemstone Quality Factor: 8.5 (Good color, clarity, and cut)
  • Craftsmanship Factor: 4.0 (Intricate design, well-made)

Assumptions (Illustrative):

  • Current Gold Price: $60/gram
  • Diamond Base Price: $5,000/carat
  • Base Craftsmanship Cost: $300

Calculation Breakdown:

  • Metal Value = 4.5g * $60/g * (14/24) = $157.50
  • Gemstone Value = 1.2ct * $5,000/ct * 8.5 = $51,000
  • Craftsmanship Value = 4.0 * $300 = $1,200

Estimated Ring Value: $157.50 + $51,000 + $1,200 = $52,357.50

Interpretation: This calculation suggests a significant portion of the ring's value comes from the diamond's quality and weight, with the gold and craftsmanship contributing smaller, though still relevant, amounts. This aligns with typical high-value engagement rings.

Example 2: Simple Silver Band

Inputs:

  • Metal Type: Silver
  • Metal Purity: 925 (Sterling Silver)
  • Metal Weight: 3.0 grams
  • Main Gemstone Type: None
  • Main Gemstone Carat Weight: 0
  • Gemstone Quality Factor: 0
  • Craftsmanship Factor: 2.0 (Standard, simple design)

Assumptions (Illustrative):

  • Current Silver Price: $0.80/gram
  • Base Craftsmanship Cost: $100

Calculation Breakdown:

  • Metal Value = 3.0g * $0.80/g * (925/1000) = $2.24
  • Gemstone Value = $0 (No gemstone)
  • Craftsmanship Value = 2.0 * $100 = $200

Estimated Ring Value: $2.24 + $0 + $200 = $202.24

Interpretation: For a simple silver band, the value is primarily driven by the craftsmanship and design, as the intrinsic value of the silver itself is relatively low. The calculator correctly reflects this, showing a modest value dominated by the labor and design input.

How to Use This Ring Value Calculator

Using the Ring Value Calculator is straightforward. Follow these steps to get an estimated value for your ring:

  1. Gather Ring Information: Identify the metal type (gold, platinum, silver), its purity (e.g., 14K, 925), the total weight of the metal in grams, the type of the main gemstone, its carat weight, and estimate its quality. Also, assess the ring's design and craftsmanship.
  2. Input Details: Enter the gathered information into the corresponding fields in the calculator. For purity, use the numeric value (e.g., 14 for 14K gold, 925 for sterling silver). For quality and craftsmanship, use the provided scales (0-10 for gemstone quality, 1-5 for craftsmanship).
  3. Check Assumptions: Review the "Key Assumptions" table to see the current market prices and base costs used in the calculation. These are estimates and can fluctuate.
  4. Calculate: Click the "Calculate Value" button.
  5. Read Results: The calculator will display the Estimated Ring Value prominently. It will also show the breakdown into Metal Value, Gemstone Value, and Craftsmanship Value.
  6. Interpret: Understand that this is an *estimated* market value, primarily reflecting material worth and design quality. It may differ from retail prices or specialized appraisals.
  7. Use Buttons: Use the "Reset" button to clear the form and start over. Use the "Copy Results" button to easily share or save the calculated values and assumptions.

Decision-Making Guidance: Use the estimated value as a starting point for decisions regarding insurance, potential sales, or simply understanding your asset's worth. For high-value or unique pieces, always consult a certified appraiser.

Key Factors That Affect Ring Value Results

Several factors significantly influence the estimated Ring Value Calculator results. Understanding these can help you provide more accurate inputs and interpret the outputs correctly:

  1. Metal Market Fluctuations: The prices of gold, platinum, and silver are commodities that change daily based on global supply, demand, and economic conditions. Higher metal prices directly increase the metal component of the ring's value.
  2. Gemstone Rarity and Demand: The type of gemstone is crucial. Diamonds, rubies, sapphires, and emeralds generally command higher prices than semi-precious stones. Rarity, origin, and current fashion trends also impact demand and price per carat.
  3. Gemstone Quality (4 Cs for Diamonds): For diamonds, the "4 Cs" – Cut, Color, Clarity, and Carat Weight – are paramount. Even slight variations in these can drastically alter value. For other gemstones, similar factors like clarity, color intensity, and cut precision play a major role. The calculator uses a simplified quality factor.
  4. Purity and Alloy Composition: Higher purity metals (e.g., 24K gold vs. 10K gold) are worth more intrinsically, but they are also softer. Alloys used to increase durability (like in 14K or 18K gold) slightly reduce the pure metal content, affecting the metal value calculation.
  5. Craftsmanship and Brand: Rings from renowned designers or those featuring intricate, handmade artistry command higher values. The calculator's craftsmanship factor attempts to capture this, but a recognized brand name adds a premium not always reflected in basic calculators. This is a key differentiator in jewelry appraisal.
  6. Condition and Wear: A ring in excellent condition with minimal scratches or damage will be valued higher than one that is heavily worn or damaged. Gemstones might be chipped, settings loosened, or metal surfaces abraded, all of which reduce value.
  7. Market Demand and Liquidity: The estimated value is influenced by how easily the ring can be sold. Highly desirable items in current fashion or classic styles may fetch closer to their estimated value, while niche or out-of-style pieces might sell for less. This relates to the concept of asset liquidity.
  8. Additional Gemstones: While the calculator focuses on the main gemstone, rings often have smaller accent stones. These add to the overall value, though their individual contribution is typically less significant than the primary stone.

Frequently Asked Questions (FAQ)

Q1: Is the value from this calculator the same as an insurance appraisal?

A1: No. This calculator provides an estimated market value, often reflecting resale potential or material worth. An insurance appraisal typically determines the retail replacement value, which is usually higher and includes retail markups. For insurance purposes, a formal appraisal is recommended.

Q2: How accurate are the current metal and gemstone prices used?

A2: The calculator uses recent average market prices. These are estimates and can fluctuate daily. For the most precise valuation, especially for investment-grade gemstones, consult real-time commodity data and specialized gemstone market reports.

Q3: What if my ring has multiple gemstones?

A3: This calculator primarily focuses on the main gemstone. If your ring has several smaller stones, their value is implicitly considered within the craftsmanship factor or may need to be estimated separately and added to the total. For accurate valuation, consider the collective impact of all stones.

Q4: Does the calculator account for antique or vintage rings?

A4: The calculator provides a baseline value based on materials and general craftsmanship. Antique or vintage rings may have significant value derived from historical significance, rarity, or unique provenance, which this tool doesn't fully capture. Expert appraisal is essential for such pieces.

Q5: Can I use this calculator for custom-designed rings?

A5: Yes, the craftsmanship factor is designed to account for unique designs. However, the value of a custom piece can be highly subjective and depend on the designer's reputation and the complexity of the work. This calculator offers an estimate, but the true value might be higher if the design is exceptionally innovative or sought-after.

Q6: What is the difference between 14K and 18K gold value?

A6: 18K gold contains a higher percentage of pure gold (75%) compared to 14K gold (58.5%). Therefore, for the same weight, 18K gold will have a higher intrinsic metal value, assuming the current market prices for gold are used in the calculation.

Q7: How does gemstone clarity affect value?

A7: Clarity refers to the presence of internal inclusions or external blemishes. Gemstones with fewer and less noticeable imperfections (higher clarity) are rarer and more valuable. The Gemstone Quality Factor in the calculator aims to incorporate this aspect.

Q8: Should I get my ring appraised if the calculator gives a high value?

A8: If the calculator provides a significantly high estimated value, or if the ring is particularly important (e.g., heirloom, expensive engagement ring), it is highly recommended to get a professional appraisal from a certified gemologist or appraiser. This ensures accuracy for insurance, legal, or resale purposes.

Related Tools and Internal Resources

© 2023 Your Financial Website. All rights reserved.

// Default current prices (these should ideally be fetched from an API or updated regularly) var currentPrices = { goldPerGram: 60.00, platinumPerGram: 50.00, silverPerGram: 0.80, diamondPerCarat: 5000.00, otherPreciousPerCarat: 1500.00, semiPreciousPerCarat: 200.00, baseCraftsmanshipCost: 200.00 }; // Purity factors for metals var purityFactors = { gold: { 24: 1.00, 22: 0.916, 18: 0.750, 14: 0.585, 10: 0.417 }, platinum: { 950: 0.950, 900: 0.900, 850: 0.850 }, silver: { 999: 0.999, 925: 0.925, 800: 0.800 }, palladium: { 950: 0.950, 500: 0.500 } }; // Gemstone base prices per carat (simplified) var gemstoneBasePrices = { diamond: 5000.00, ruby: 1500.00, sapphire: 1200.00, emerald: 1000.00, other_precious: 1500.00, semi_precious: 200.00, none: 0 }; // Function to get purity factor based on input function getPurityFactor(metalType, purityInput) { var purity = parseFloat(purityInput); if (isNaN(purity)) return 0; if (metalType === 'gold') { if (purity >= 24) return purityFactors.gold[24]; if (purity >= 22) return purityFactors.gold[22]; if (purity >= 18) return purityFactors.gold[18]; if (purity >= 14) return purityFactors.gold[14]; if (purity >= 10) return purityFactors.gold[10]; } else if (metalType === 'platinum') { if (purity >= 950) return purityFactors.platinum[950]; if (purity >= 900) return purityFactors.platinum[900]; if (purity >= 850) return purityFactors.platinum[850]; } else if (metalType === 'silver') { if (purity >= 999) return purityFactors.silver[999]; if (purity >= 925) return purityFactors.silver[925]; if (purity >= 800) return purityFactors.silver[800]; } else if (metalType === 'palladium') { if (purity >= 950) return purityFactors.palladium[950]; if (purity >= 500) return purityFactors.palladium[500]; } return 0; // Return 0 if purity is not recognized } // Function to get current metal price function getCurrentMetalPrice(metalType) { switch (metalType) { case 'gold': return currentPrices.goldPerGram; case 'platinum': return currentPrices.platinumPerGram; case 'silver': return currentPrices.silverPerGram; case 'palladium': return currentPrices.platinumPerGram * 0.7; // Palladium price is often linked to platinum default: return 0; } } // Function to get gemstone base price function getGemstoneBasePrice(gemstoneType) { return gemstoneBasePrices[gemstoneType] || 0; } // Function to validate input fields function validateInputs() { var isValid = true; var metalPurity = document.getElementById('metalPurity'); var metalWeight = document.getElementById('metalWeight'); var gemstoneCarat = document.getElementById('gemstoneCarat'); var gemstoneQuality = document.getElementById('gemstoneQuality'); var craftsmanship = document.getElementById('craftsmanship'); var metalPurityError = document.getElementById('metalPurityError'); var metalWeightError = document.getElementById('metalWeightError'); var gemstoneCaratError = document.getElementById('gemstoneCaratError'); var gemstoneQualityError = document.getElementById('gemstoneQualityError'); var craftsmanshipError = document.getElementById('craftsmanshipError'); // Clear previous errors metalPurityError.style.display = 'none'; metalWeightError.style.display = 'none'; gemstoneCaratError.style.display = 'none'; gemstoneQualityError.style.display = 'none'; craftsmanshipError.style.display = 'none'; // Metal Purity Validation var purityValue = parseFloat(metalPurity.value); var metalType = document.getElementById('metalType').value; var purityFactor = getPurityFactor(metalType, purityValue); if (isNaN(purityValue) || purityValue <= 0 || purityFactor === 0) { metalPurityError.textContent = 'Please enter a valid purity value for the selected metal.'; metalPurityError.style.display = 'block'; isValid = false; } // Metal Weight Validation var weightValue = parseFloat(metalWeight.value); if (isNaN(weightValue) || weightValue <= 0) { metalWeightError.textContent = 'Please enter a valid metal weight (must be positive).'; metalWeightError.style.display = 'block'; isValid = false; } // Gemstone Carat Validation var caratValue = parseFloat(gemstoneCarat.value); if (isNaN(caratValue) || caratValue < 0) { gemstoneCaratError.textContent = 'Please enter a valid carat weight (cannot be negative).'; gemstoneCaratError.style.display = 'block'; isValid = false; } // Gemstone Quality Validation var qualityValue = parseFloat(gemstoneQuality.value); if (isNaN(qualityValue) || qualityValue 10) { gemstoneQualityError.textContent = 'Gemstone quality must be between 0 and 10.'; gemstoneQualityError.style.display = 'block'; isValid = false; } // Craftsmanship Validation var craftValue = parseFloat(craftsmanship.value); if (isNaN(craftValue) || craftValue 5) { craftsmanshipError.textContent = 'Craftsmanship factor must be between 1 and 5.'; craftsmanshipError.style.display = 'block'; isValid = false; } return isValid; } // Function to update chart function updateChart(metalValue, gemstoneValue, craftsmanshipValue) { var ctx = document.getElementById('valueBreakdownChart').getContext('2d'); if (window.myChart) { window.myChart.destroy(); } window.myChart = new Chart(ctx, { type: 'bar', data: { labels: ['Metal Value', 'Gemstone Value', 'Craftsmanship Value'], datasets: [{ label: 'Value Component', data: [metalValue, gemstoneValue, craftsmanshipValue], backgroundColor: [ 'rgba(0, 74, 153, 0.7)', // Primary color for Metal 'rgba(40, 167, 69, 0.7)', // Success color for Gemstone 'rgba(108, 117, 125, 0.7)' // Secondary color for Craftsmanship ], borderColor: [ 'rgba(0, 74, 153, 1)', 'rgba(40, 167, 69, 1)', 'rgba(108, 117, 125, 1)' ], borderWidth: 1 }] }, options: { responsive: true, maintainAspectRatio: false, scales: { y: { beginAtZero: true, ticks: { callback: function(value) { return '$' + value.toLocaleString(); } } } }, plugins: { legend: { display: false // Hide legend as labels are on bars }, tooltip: { callbacks: { label: function(context) { var label = context.dataset.label || "; if (label) { label += ': '; } if (context.parsed.y !== null) { label += new Intl.NumberFormat('en-US', { style: 'currency', currency: 'USD' }).format(context.parsed.y); } return label; } } } } } }); } // Function to update results and chart function updateRingValue() { // This function is called on input change to provide real-time feedback // It calls calculateRingValue() to update the display calculateRingValue(); } // Main calculation function function calculateRingValue() { if (!validateInputs()) { // If validation fails, clear results or show default state document.getElementById('primaryResult').textContent = '$0.00'; var intermediateSpans = document.querySelectorAll('#results-container .intermediate-results span'); intermediateSpans.forEach(function(span) { span.textContent = '$0.00'; }); updateChart(0, 0, 0); // Clear chart return; } var metalType = document.getElementById('metalType').value; var metalPurityInput = document.getElementById('metalPurity').value; var metalWeight = parseFloat(document.getElementById('metalWeight').value); var gemstoneType = document.getElementById('gemstoneType').value; var gemstoneCarat = parseFloat(document.getElementById('gemstoneCarat').value); var gemstoneQuality = parseFloat(document.getElementById('gemstoneQuality').value); var craftsmanship = parseFloat(document.getElementById('craftsmanship').value); var purityFactor = getPurityFactor(metalType, metalPurityInput); var currentMetalPrice = getCurrentMetalPrice(metalType); var gemstoneBasePrice = getGemstoneBasePrice(gemstoneType); var baseCraftsmanshipCost = currentPrices.baseCraftsmanshipCost; // Calculate components var metalValue = metalWeight * currentMetalPrice * purityFactor; var gemstoneValue = gemstoneCarat * gemstoneBasePrice * (gemstoneQuality / 10); // Scale quality factor var craftsmanshipValue = craftsmanship * baseCraftsmanshipCost; // Scale craftsmanship factor // Ensure values are not NaN and handle 'none' gemstone type metalValue = isNaN(metalValue) ? 0 : metalValue; gemstoneValue = (gemstoneType === 'none' || isNaN(gemstoneValue)) ? 0 : gemstoneValue; craftsmanshipValue = isNaN(craftsmanshipValue) ? 0 : craftsmanshipValue; var totalValue = metalValue + gemstoneValue + craftsmanshipValue; // Update primary result document.getElementById('primaryResult').textContent = '$' + totalValue.toLocaleString(undefined, { minimumFractionDigits: 2, maximumFractionDigits: 2 }); // Update intermediate results var intermediateSpans = document.querySelectorAll('#results-container .intermediate-results span'); intermediateSpans[0].textContent = '$' + metalValue.toLocaleString(undefined, { minimumFractionDigits: 2, maximumFractionDigits: 2 }); intermediateSpans[1].textContent = '$' + gemstoneValue.toLocaleString(undefined, { minimumFractionDigits: 2, maximumFractionDigits: 2 }); intermediateSpans[2].textContent = '$' + craftsmanshipValue.toLocaleString(undefined, { minimumFractionDigits: 2, maximumFractionDigits: 2 }); // Update assumptions table document.getElementById('assumptionsTable').rows[1].cells[1].textContent = '$' + currentPrices.goldPerGram.toFixed(2) + '/g'; document.getElementById('assumptionsTable').rows[2].cells[1].textContent = '$' + currentPrices.platinumPerGram.toFixed(2) + '/g'; document.getElementById('assumptionsTable').rows[3].cells[1].textContent = '$' + currentPrices.silverPerGram.toFixed(2) + '/g'; document.getElementById('assumptionsTable').rows[4].cells[1].textContent = '$' + gemstoneBasePrices.diamond.toLocaleString(undefined, { minimumFractionDigits: 0, maximumFractionDigits: 0 }) + '/ct'; document.getElementById('assumptionsTable').rows[5].cells[1].textContent = '$' + gemstoneBasePrices.other_precious.toLocaleString(undefined, { minimumFractionDigits: 0, maximumFractionDigits: 0 }) + '/ct'; document.getElementById('assumptionsTable').rows[6].cells[1].textContent = '$' + gemstoneBasePrices.semi_precious.toLocaleString(undefined, { minimumFractionDigits: 0, maximumFractionDigits: 0 }) + '/ct'; document.getElementById('assumptionsTable').rows[7].cells[1].textContent = '$' + currentPrices.baseCraftsmanshipCost.toFixed(2); // Update chart updateChart(metalValue, gemstoneValue, craftsmanshipValue); } // Function to reset form to default values function resetForm() { document.getElementById('metalType').value = 'gold'; document.getElementById('metalPurity').value = '14'; document.getElementById('metalWeight').value = '5'; document.getElementById('gemstoneType').value = 'diamond'; document.getElementById('gemstoneCarat').value = '1'; document.getElementById('gemstoneQuality').value = '7'; document.getElementById('craftsmanship').value = '3'; // Clear errors document.getElementById('metalPurityError').style.display = 'none'; document.getElementById('metalWeightError').style.display = 'none'; document.getElementById('gemstoneCaratError').style.display = 'none'; document.getElementById('gemstoneQualityError').style.display = 'none'; document.getElementById('craftsmanshipError').style.display = 'none'; calculateRingValue(); // Recalculate with default values } // Function to copy results function copyResults() { var primaryResult = document.getElementById('primaryResult').textContent; var intermediateResults = document.querySelectorAll('#results-container .intermediate-results span'); var assumptionsTable = document.getElementById('assumptionsTable'); var assumptionsText = "Key Assumptions:\n"; for (var i = 1; i < assumptionsTable.rows.length; i++) { assumptionsText += assumptionsTable.rows[i].cells[0].textContent + ": " + assumptionsTable.rows[i].cells[1].textContent + "\n"; } var textToCopy = "Estimated Ring Value: " + primaryResult + "\n\n" + "Breakdown:\n" + "Metal Value: " + intermediateResults[0].textContent + "\n" + "Gemstone Value: " + intermediateResults[1].textContent + "\n" + "Craftsmanship Value: " + intermediateResults[2].textContent + "\n\n" + assumptionsText; navigator.clipboard.writeText(textToCopy).then(function() { // Optional: Show a confirmation message var btnCopy = document.querySelector('.btn-copy'); var originalText = btnCopy.textContent; btnCopy.textContent = 'Copied!'; setTimeout(function() { btnCopy.textContent = originalText; }, 2000); }).catch(function(err) { console.error('Failed to copy text: ', err); // Optional: Show an error message }); } // Initial calculation on page load window.onload = function() { // Load Chart.js library dynamically if not already present if (typeof Chart === 'undefined') { var script = document.createElement('script'); script.src = 'https://cdn.jsdelivr.net/npm/chart.js'; script.onload = function() { calculateRingValue(); // Calculate after chart library is loaded }; document.head.appendChild(script); } else { calculateRingValue(); // Calculate immediately if Chart.js is already available } };

Leave a Comment