Anyone ever seen this before? Basically clear mica but with black smokey looking intrusions, something geological in the way of tar/bitumen leeching into the cleaving planes?
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7 years ago
Black mica?
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7 years ago
Intrusions or *inclusions* do you mean?
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7 years ago
I'm no geologist, not erratics anyway. Randomly distributed swirls like colours in marble, but smokey black colour
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7 years ago
Sure; Amelia County, VA has some old mica mines, the native stuff is near black (but that's 0.3 inch thick, and it's prepared by cleaving down to 0.003" thickness).
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7 years ago
So it's just availability? There's no special quality of black mica over the regular stuff?
Michael
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7 years ago
....Just paint it black !
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7 years ago
I don't suppose you happen to know whether the insulation property is just the same? I'm thinking whether the black material may absorb water vapour
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7 years ago
Pretty much all questions answered right here:
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Ontario seems to be one source of "Dark Mica".
Some types do absorb moisture, but, it is not as if they would be used for insulators.
The original "Glitter".
Peter Wieck Melrose Park, PA