Lab Notes Gems & Gemology, Winter 1987, Volume 23, No. 4

Winter 1987 G&G Lab Notes

Faceted Amber
Imitation Amber
Calcium Carbonate Beads
Corundum Doublets
Synthetic Emerald
Imitation Jade
Cultured Black Pearl
Large Cultured Pearl
An Oyster "Pearl"
Heat-Treated Natural and Synthetic Ruby
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