Fall 2007 G&G Lab Notes

Large Cat’s-Eye Aquamarine
Dyed Blue Chalcedony Detected by UV-Vis-NIR Spectroscopy
Historic “Piggyback” Diamond
Natural Type IIb Blue Diamond with Atypical Electroluminescence
An Unsuccessful Attempt at Diamond Deception
Kyanite Resembling Blue Sapphire
Phenakite as a Rough Diamond Imitation
Glass-Filled Synthetic Ruby

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