Gemmology Calculators
Carat weight, gem ID, refractive index, SG, valuation, faceting, and jewelry calculators for gemmologists and dealers.
60 tools available
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Core (5)
Gem Testing (5)
Faceting & Cutting (5)
Grading & Valuation (5)
Jewelry & Setting (5)
Business & E-commerce (5)
Identification (10)
Measurement (10)
Grading Tools (10)
- Type 1/2/3 Clarity Expectation Calculator
- Clarity Grade Normalizer
- Saturation Premium Calculator
- Shape Premium Calculator
- Cut-Window Penalty Calculator
- Extinction Penalty Calculator
- Commercial Grade Score Calculator
- Matching Pair Calculator
- Parcel Consistency Score Calculator
- Buyer Confidence Score Calculator