Estimate your jewelry material costs with real-time official rates. 17 alloys, stone nomenclature, mm/carat conversion and instant summary.
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Material cost is the foundation of every jewelry estimate. It includes precious metal prices (gold, silver, platinum, palladium) and stones (diamonds, sapphires, rubies, emeralds). Accurately calculating this cost is essential for creating fair quotes, negotiating with subcontractors, and maintaining healthy margins.
Precious metal prices fluctuate daily on the international market. The LBMA fixing (London Bullion Market Association) is the global reference for gold, silver, platinum, and palladium. Prices are expressed in dollars per troy ounce (31.1035 grams) and converted to euros. Each alloy (750 gold, 585 gold, 950 platinum, 925 silver...) contains a defined proportion of fine metal, which determines its price per gram. Our calculator automatically integrates current LBMA rates and applies the fineness of each alloy.
Stone cost depends on several parameters: type (natural diamond, lab-grown, colored stones), weight in carats, quality (color, clarity, cut), and market availability. For pave diamonds (melee), pricing is typically per piece based on diameter. For center stones (from 0.30 carats), pricing is usually per carat. Our tool offers a diameter/carat conversion table based on industry standards and adjustable indicative prices.
Material cost is just one component of the final price. Fabrication costs (labor, tooling, finishing) and commercial margin must be added. In jewelry, mark-up coefficients vary by positioning: from ×2.5 for entry-level to ×5 or more for luxury. A jewelry management software like Liink centralizes these calculations, tracks actual production costs, and optimizes margins on every order.
Everything about calculating jewelry material costs
The price per gram of an alloy is calculated by multiplying the pure metal rate (LBMA fixing in EUR/g) by the alloy fineness. For example, for 750 gold (18 karat), you multiply the pure gold rate by 0.75. For special alloys like palladium white gold, the calculation accounts for each metal's proportion (75% gold + 12.5% palladium + 12.5% silver).
Casting loss refers to metal lost during casting, rolling, and machining operations. It varies by technique: 2-5% for lost-wax casting, 1-3% for CNC milling, up to 10% for certain traditional methods. Our calculator allows you to add a loss percentage to the initial weight for a realistic cost estimate.
The diameter/carat conversion is not linear because weight also depends on the stone's depth and cut. Our conversion table is based on standard round brilliant cut proportions. For example, a 6.5mm diamond weighs approximately 1.00 carat, while a 1.2mm diamond weighs about 0.009 carat. For fancy cuts, actual weight may vary by 5 to 15%.
The displayed rates come from the LBMA fixing (London Bullion Market Association), the global reference for precious metals. They are updated daily and cached for 1 hour for optimal performance. The afternoon fixing is used for gold and platinum. The source is indicated: 'LBMA' for official rates, 'Estimated' if the service is temporarily unavailable.
Yes, the calculator offers a 'Custom price' option that lets you enter your own price per gram for the selected alloy. This is useful if you have negotiated specific rates with your precious metals supplier or want to simulate different cost scenarios.
Use the 'Copy link' button in the summary. The complete calculator state (alloy, weight, stones, options) is encoded in the URL. Anyone opening this link will see the exact same configuration. It's ideal for sharing estimates with colleagues or clients.
Liink integrates material cost calculation directly into your production workflow. Automatic quotes, rate tracking, real-time margins.