Gemstone Examination Lesson
Learning how to conduct a gemstone examination takes practice. Follow an expert gemologist step-by-step through tests of five unknown samples.…
What are Gemstone Absorption Spectra?
Learn how gems absorb wavelengths of light and how gemologists use gemstone absorption spectra to identify gems. There’s more to color than…
Recommended Gemology Tools and Instruments
Gemstone identification requires a good reference library and some basic gemology tools. Before you go shopping, learn more about what you’ll…
Ultraviolet Testing and Gemstone Identification
Ultraviolet testing can be crucial for gemstone identification. Learn the basics of this technique as well as how to make your own UV viewing box.…
The Spectroscope
The spectroscope is a fundamental gemological tool. Learn how to use it to identify gemstones based on their absorption of different wavelengths…
Advanced Gemology Equipment
We often recommend that novice gemologists send gems that are difficult to identify to a laboratory for testing. Gemological and mineralogical…
Gemstone Magnetism
Although gemstone magnetism isn’t a commonly tested gemstone property, it may be useful for making quick separations outside the lab. By Richard…
Tips for Measuring Specific Gravity
Step 3: Practical Gemology Lesson 10 Back to syllabus Getting accurate readings when testing gemstone specific gravity is critical. If you make…
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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