FacetLab

Free open-source browser simulator that teaches diamond grading by polishing diamonds

Webfreeglobal

A free open-source WebGL browser simulator that teaches diamond grading by letting players inspect rough crystals, reveal inclusions, plan orientation, choose proportions and polish facets to generate a 4Cs scorecard. Designed for jewellery learners, students and enthusiasts who need a hands-on way to understand the trade-offs between cut, colour, clarity and carat, it runs client-side with no signup and is educational only, not for actual appraisal.

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