Spring 1987 G&G Lab Notes
Diamond with Interesting Inclusions
Synthetic Diamond
Diaspore, a Rare Gem Material
Goethite
Lodestone Magnetite
Nephrite Imitation
Unusual Clam "Pearl"
Pearls and their Apparent Colors
Quartz Fossiliferous Chalcedony
Phenomenal Quartz
Natural Ruby Doublet
Ruby with Unusual Cavities
Heated Sapphire
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