Gemstone Magnetism: The Forgotten Property
Although gemstone magnetism isn’t a commonly tested gemstone property, it may be useful for making quick separations outside the lab. By Richard…
Gemstone Physical Properties
Step 2: Advanced Gemology Lesson 2 Back to syllabus The optical properties of gems attract our eyes and can give a cut stone a unique character. However,…
Identifying Inclusions Found in Enhanced Gems
Gemstone treatments can have a significant impact on the value and stability of a stone. The following enhancement processes leave behind some…
Identifying Inclusions of Specific Gems
Imagine you find this blue gemstone for sale at a pawn shop. Can the inclusions you see help you narrow the range of possible identifications? Absolutely.…
What is a Gem?
Step 1: Introduction to Gemology Lesson 2 Back to syllabus For thousands of years, people have used terms like “gem” and “gemstone”…
A Guide to Gem Classification
Little is simple and straightforward in gemology. Every established principle has an exception. This applies to gem classification as well.…
What are Crystal Systems and Mineral Habits?
In crystallography, mineral habits refer to the way crystals form within a specific mineral. In A Guide to Gem Classification, I mentioned that,…
Lapidary Fundamentals: Cabochon Cutting
Cabochon cutting or cabbing is the most popular form of gem cutting. Although it requires a fair amount of skill, almost anyone can master this technique.…
Gemstone Toxicity Table
Gem faceters and jewelry enthusiasts alike should learn about gemstone toxicity. This table has toxicity ratings for 280+ gems, based on their…
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