Fall 2009

Lab Notes

DIAMOND
Fancy Red, Irradiated and Annealed
With Hydrogen Cloud and Etch Channels
Large Type Ib Yellow Diamond Colored by Isolated Nitrogen
Patterned Green Radiation Stains

Pumpellyite in QUARTZ

A Useful Technique to Identify Negative Crystals in RUBY

“Textbook” Columbite in TOPAZ

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