Gemology
Gemology calculators for carat weight, diamond pricing, gem cut yield, refractive index, specific gravity, and faceting angles.
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Carat Weight Estimator
Estimate gemstone carat weight from dimensions and specific gravity for mounted and unmounted stones.
Diamond Price Calculator
Estimate diamond price per carat from the 4Cs: cut, clarity, color, and carat weight.
Faceting Angle Calculator
Calculate optimal crown and pavilion angles for different gem cuts based on refractive index.
Fluorescence Impact Calculator
Calculate diamond price adjustment for fluorescence grade relative to color grade.
Gem Cut Yield Calculator
Estimate expected polished gemstone weight from rough stone weight, shape, and target cut.
Gem Investment Return Calculator
Calculate ROI from gemstone purchase price, appreciation rate, holding period, and transaction costs.
Gem Parcel Pricing Calculator
Calculate per-carat price for calibrated and uncalibrated gem parcels based on size, quality, and count.
Gem Treatment Value Impact Calculator
Calculate price adjustment factors for treated vs untreated gemstones by treatment type and gem species.
Gemstone Density Calculator
Calculate specific gravity from hydrostatic weighing (weight in air and water) for gem identification.
Refractive Index Calculator
Interpret RI measurement and birefringence for gemstone identification against a reference database.