Lab Notes Gems & Gemology, Winter 2002, Volume 38, No. 4

Winter 2002 G&G Lab Notes

“Piranha” Agate
Surface-Treated Amber
Unusual Ceramic Gem Simulant
More Bulk Diffusion—Rubies and Orange Sapphire
Diamond with Internal Inscriptions
Two Large Glass Imitation Jade Carvings
Jadeite Bleached, Impregnated, and Dyed, with Unusual Inclusions
Cultured Pearls with Treated Yellow Color
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