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What is a swart mineral?

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A wikipedia article refers to a "swart mineral." (As the backing for an opal doublet and gives examples as basalt, ironstone and others). I am not able to find this "geological" term online. I believe that the authors may have used this to mean "schwarz" - (German for black, which IS the desired color for an opal doublet's backing). Is "swart mineral" a real geological term?

asked Jan 19, 2014 by dpulitzer (120 points)

1 Answer

0 votes

I agree, its probably a mistake from schwarz. Never heard that term used either.

answered Jan 20, 2014 by hershel (45,560 points)

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