Summer 1992 G&G Lab Notes
Large Chameleon-Type Diamond
Treated "Black" Diamond
Emerald Imitation: Yag
Glass Imitations of Various Gems
Black Pearls from Baja California
Treated Black Mabes
"Geneva [Synthetic] Ruby"
Durability of Heat-Treated Sapphire
Identifying Curved Striae in Yellow Synthetic Sapphire
To view the full section, download the PDF above.