Lab Notes Gems & Gemology, Winter 2008, Volume 44, No. 4

Winter 2008 G&G Lab Notes

Fancy Dark Brown-Yellow Zoned Type IIa/IIb Diamond
HPHT-Treated CVD Synthetic Diamond Submitted for Dossier Grading
Quartz with Secondary Covellite Dendrites
Induced Copper Contamination of Tourmaline
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