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 Optical Properties
We tend to take light for granted. It’s such a common thing we experience every day. Rarely do we think of the scientific definition of light…
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,…
Gemstone Color Change Phenomena
People frequently ask me to explain how gemstone color change works. Some stones can change color under different types of light sources. Although…
Gemstone Radiation Treatment
Most gems on the market today receive various treatments to change their natural colors and create more desirable, salable products. Radiation…
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.…
An Introduction to Fancy Gem Cuts
Step 1: Introduction to Gemology Lesson 24 Back to syllabus The cut is humanity’s contribution to the beauty of gemstones. Color, clarity, and…
An Introduction to Gemology
Step 1: Introduction to Gemology Lesson 1 Back to syllabus Gemology is the scientific study of gemstones. Although there may be investors and collectors…
Gem Formation: How are Gemstones Created?
Most gems form naturally as minerals within the Earth. Most form as crystals, solids whose atoms are arranged in highly ordered repeating patterns…
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