GIA’s Gem Encyclopedia is a virtual journey through the science and lore of gemstones from across the globe. Each precious stone page features additional detailed gemological information, a buyer’s …

Gemstone identification chart, updated edition 2025, for the identification of synthetic and treated gemstones.

National Gem Lab is providing Unique gemstone identification chart to search easily from our search bar to find Refractive Index, Hardness & Specifc gravity

Table of Refractive Indices and Double Refraction of Selected Gems Refractive indices and double refraction (birefringence) help gemologists identify gems. The following table lists these values for …

A gemstone identification chart, combined with illustrative pictures, serves as a fundamental resource for both budding enthusiasts and seasoned collectors alike.

Our gemstone list features over 200 precious and semi-precious varieties, a comprehensive index to find the ideal colored stone. Whether for jewelry, collecting, or crystal healing, this gemstone list guides …

Access a detailed gemstone identification chart covering 20 popular stones, including their unique properties, distinguishing features, and origins.

Whether you’re new to gemstone mining or an experienced collector, a gem chart helps identify different gemstones based on color, hardness, clarity, and other characteristics.

Learn about gemstones with our free AI identification tool. Discover minerals, properties, formation, value, and cultural significance of precious and semi-precious stones! Perfect for collectors, jewelry …

Browse this gemstone reference table indexed by refractive index. Use it alongside color, UV reaction, spectroscope patterns, inclusions, and other tests to identify gems with confidence.