Discover the specific gravity values of selected gems with this comprehensive table. An essential tool for gemologists. International Gem Society
Discover the Mohs Hardness Scale and Chart for Select Gems with this comprehensive guide by the International Gem Society. Explore the world of gemology and enhance your knowledge with valuable information on the hardness of different gemstones.
Discover gems organized by crystal system in the “Table of Gems Ordered by Crystal System.” A comprehensive resource for gemologists and enthusiasts.