Gemstone Calculators

Professional calculators for gemstone evaluation, jewelry design, and precious stone analysis.

Calculate the value of gemstones based on the 4 Cs: carat, cut, color, and clarity.

Convert between carats, grams, and other weight measurements for gemstones.

Calculate the cost of setting gemstones into jewelry pieces.

Gemstone Evaluation Guide

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Weight measurement - 1 carat = 0.2 grams

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Quality of proportions, symmetry, and polish

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Absence of color in colorless stones

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Absence of inclusions and blemishes

Hardness: 10 | Density: 3.52 g/cm³

The hardest natural substance

Hardness: 9 | Density: 4.00 g/cm³

Red variety of corundum

Hardness: 9 | Density: 4.00 g/cm³

Non-red varieties of corundum

Hardness: 7.5-8 | Density: 2.67 g/cm³

Green variety of beryl

Hardness: 7 | Density: 2.65 g/cm³

Yellow variety of quartz

Hardness: 7 | Density: 2.65 g/cm³

Purple variety of quartz