Fall 1983 G&G Lab Notes
Amber, in Plastic
Diamond Simulant
Mysterious Wear on a Diamond Ring
Painted Diamonds
Diaspore, a Rare Gem Material
Emerald
Jade Substitute
Lapis Lazuli, a New Imitation
Synthetic Opal
Cultured Button Pearls
Pinite, a Massive Form of Muscovite
Zoisite (Tanzanite)
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