Winter 1981 G&G Lab Notes
A Coral Substitute, Dyed Marble
Angular Grooves on Diamond
Burned Diamond
"Chameleon" Diamond
Green Diamonds
Emerald Substitute, Dyed Beryl
A Remarkable Three-Phase Inclusion in Emerald
Natural Pearls Worn Out
Pearl Simulant
Dyed "Crackled" Quartz
Star Quartz
Heat-Treated Yellow-Orange Sapphires
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