Black Plume Opal Rare Cabochon, 18x27x4 mm, natural flat back cbos (bp81171)x
Rare Black Plume OpalOrigin: Mexico
Colors: Black, golden brown and white.
Material: Black Plume Opal
Characteristics: Best polish front and sides, flat on back, low dome, translucent, some very small pits and minor inclusions.
Approx size: 18 x 27 x 4 mm Weight 16 ct
This material surfaced sometime in the early 60's and sold out immediately. One add found in one monthly Rock and Gem mag from the 60's and nothing else. Add stated it was from Mexico. If you don't have it in your collection better get one, I have only a few and they are my last and I don't expect to see it again. The last picture is using a back light so you can see the black plumes.
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