Summer 1987 G&G Lab Notes
A New Opal Assemblage
A Cultured Pearl Puzzle
A "Fossilized Pearl" from Utah
Cat's-Eye Peridot
Dyed Yellow Quartzite
Synthetic Blue Sapphire
Synthetic Yellow Sapphire
Unusual Inclusions in Heat-Treated Blue Sapphire
Dyed Yellow and Reddish Orange Serpentine
Sapphirine, a Rare Gemstone
Bicolor Topaz
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