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Milky white opals
UV-Reactive Opal

Troy Ardon, April 30, 2014

The first documented UV-reactive chemical treatment to make opal appear tenebrescent.

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The internal structures of natural pearls from the marine mollusk Pinctada maxima are the subject of the lead article in this issue. The scattered loose pearls on the cover are from Paspaley’s natural pearl collection, which includes one discovered in the 1970s at the Eighty Mile Beach fishing grounds
G&G Spring 2021 Edition
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