Recutting Diamonds and Colored Gemstones
As a professional gemologist, you’ll grade and value gems. Occasionally, you’ll come across a stone that may need recutting. However,…
Searching for Diamonds Online
Buying a diamond engagement ring shouldn’t be difficult. But, for online buyers, the search parameters and options can be overwhelming. Learn…
Understanding Yellow Diamonds
3.75-ct emerald-cut fancy yellow diamond with Burmese rubies. © Jogani Beverly Hills. Used with permission. Perhaps the most fantastic…
Color Grading Fancy Colored Diamonds
Step 4: Gem Grading Lesson 14 Back to syllabus Diamonds come in every color of the rainbow. Our standard white diamonds are either colorless or tinted…
Understanding Gemstone Facets
Step 1: Introduction to Gemology Lesson 22 Back to syllabus Facets, those “geometrically arranged, flat surfaces” that cover faceted gemstones,…
How to Grade Fancy Cut Diamonds
“Fancies” — fancy shape or fancy cut diamonds — can have any finished shape other than round. Some well-known examples include princess,…
Identifying Synthetic Diamonds
Step 5: Advanced Gem Information Lesson 2 Back to syllabus Synthetic diamonds aren’t new. General Electric (GE) has been making them since…
Using Your Spectroscope
Step 3: Practical Gemology Lesson 3 Back to syllabus Sometimes, refractive index (RI) and specific gravity (SG) readings aren’t enough…
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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