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Advanced Gemology Equipment

We often recommend that novice gemologists send gems that are difficult to identify to a laboratory for testing. Gemological and mineralogical…

Heavy Liquids for Specific Gravity Testing

Step 3: Practical Gemology Lesson 11 Back to syllabus Heavy liquids are chemical solutions with known high densities. Sets are sold for testing…

Video: How to Test for Specific Gravity

Determining a gem’s specific gravity is an important technique for identifying its species. Watch this tutorial video to learn how…

Testing for Specific Gravity

Step 3: Practical Gemology Lesson 7 Back to syllabus Specific gravity testing is a technique gemologists use to differentiate and identify gems…

Physical Properties of Gemstones

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,…

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Advanced Gemology Equipment

Heavy Liquids for Specific Gravity Testing

Video: How to Test for Specific Gravity

Testing for Specific Gravity

Physical Properties of Gemstones

An Introduction to Gemstone Inclusions

Identifying Inclusions of Specific Gems

What Does the GIA Colored Gem Grading Code Mean?

Gem Price Guide