Lab Notes Gems & Gemology, Spring 1997, Issue 33, No. 1

Spring 1997 G&G Lab Notes

Two Noteworthy Diamonds from the Americas
Diamond Damaged from Wear
Identifying Filled Fractures in Diamond
Imitation Diamond
Hornbill "Ivory"
Mogul Talismans: Spinel, Sapphire and Aquamarine Beads
Opal with True Chatoyancy
Quartz with Cat's-Eye Effect Caused by Large Rutile Needles
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