Lab NotesGems & Gemology, Fall 2009, 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
 
To view the full section, download the PDF above.

You Might Also Like

YMAL AJP
Discover GIA's New Campus in London
Learn About NextGem
GIA NextGem™ Diamond Training for Retail
Explore GIA Laboratory Promotional Offers
Explore GIA Laboratory Promotional Offers
Shop the GIA Store
Shop the GIA Store