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Bill Southern, September 13, 2017 in ROCKS, MINERALS and FOSSILS
I Agree Bill, ...I think that's called a star opal, and unless I am mistaken, they are mined over somewhere in Africa?? They are valued at "Big-Bucks" by the carat.
Amazing what nature can produce
Stunning for sure-thanks much for the live action,-John
Looks like harlequin opal from Australia. Either that or black opal. In any case, it's some of the best I've ever seen.
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