Lab Notes Gems & Gemology, Winter 1985, Volume 21, No. 4

Winter 1985 G&G Lab Notes

Bicolor Beryl
Heat-Induced Color Change in Diamond
Diamond with Natural Internal Irradiation Stain
Piggyback Diamond
Fancy Diamond Simulant, Yellow Cubic Zirconia
Melted Garnet and-Glass Doublet
Carved Jet
Oiled Lapis Lazuli
Conch "Pearls"
Imitation ¾ Cultured Blister Pearls
Ruby with Unusual Inclusions
Spinel Color Change
Synthetic Spinel Color Change
Synthetic Zincite
Unclassified Oddity

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