Winter 1992 G&G Lab Notes
Colored Diamond Crystal Set in a "Renaissance Ring"
Synthetic Emerald Overgrowth on Faceted Beryls Used in Jewelry
Pink Hydrogrossular Garnet
Black Opal
Freshwater Natural Pearl from Alabama
Synthetic Green Quartz
Color-Zoned Sapphire
Durability of Diffusion-Treated Sapphire
Yellow Sapphire with Unusual Fluorescence
Synthetic Star Sapphire of Unusual Color
Unusual Bicolor Zoisite
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