Lab Notes Gems & Gemology, Volume 45, No. 3

Fall 2009 G&G Lab Notes

Fancy Red Irradiated and Annealed Diamond
Diamond With Hydrogen Cloud and Etch Channels
Large Type Ib Yellow Diamond Colored by Isolated Nitrogen
Patterned Green Radiation Stains in Diamond
Pumpellyite in Quartz
A Useful Technique to Identify Negative Crystals in Ruby
“Textbook” Columbite in Topaz
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