appraise-gemstone

# Appraise Gemstone Appraise gemstone value using the four Cs (colour, clarity, cut, carat weight), treatment detection, origin assessment, and market factor analysis. This is educational advisory guidance only and does not constitute a certified gemological appraisal. > **DISCLAIMER**: This procedure provides educational guidance on gemstone valuation methodology. It is NOT a certified appraisal. For insurance, estate, sale, or legal purposes, always obtain a formal appraisal from a certified gemologist (GIA Graduate Gemologist, FGA, or equivalent). Gemstone values can vary enormously based on factors that require hands-on professional assessment. ## When to Use - You want to understand the factors that determine a gemstone's value - You are pre-screening stones before paying for a professional appraisal - You need to evaluate whether a seller's asking price is within a reasonable range - You are learning gemstone grading methodology for educational purposes - You want to understand how treatment status affects value ## Inputs - **Required**: Identified gemstone (species confirmed — see `identify-gemstone`) - **Required**: Access to the stone (loose preferred; mounted stones limit assessment) - **Optional**: Carat scale (accurate to 0.01 ct) - **Optional**: 10x loupe or gemological microscope - **Optional**: Daylight-equivalent light source (5500-6500K) - **Optional**: Colour grading master stones or reference images (GIA system) - **Optional**: Refractometer and Chels...