Lab Notes Gems & Gemology, Winter 2008, Volume 44, No. 4 Winter 2008 G&G Lab Notes Download PDF 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 To view the full section, download the PDF above.
