A Black Opal Pendant - A 9.86cts. Center Stone Natural Black Opal
Lot No. ：AAARS-BO-P-201027
Feature：A black opal* pendant, size 36x44x16mm.
* Opal is the national gemstone of Australia. Opal was rare and very valuable in antiquity. In Europe it was a gem prized by royalty. Precious opal displays play-of-color (iridescence), common opal does not. The internal structure of precious opal causes it to diffract light, resulting in play-of-color. Depending on the conditions in which it formed, opal may be transparent, translucent or opaque and the background color may be white, black or nearly any color of the visual spectrum. Black opal is considered to be the rarest, whereas white, gray and green are the most common.
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