BIOTITE on ADULARIA Copper-brown flaky biotite aggregate on adularia, from an Alpine-type vein in ultrabasic rocks. Shingus, Gilgit, Pakistan. Aggregate is 3.5 cm wide. Regis Duquenne collection Photo : Stephan WEISS E-mail : s.weiss@lapis.de Photo courtesy of İLAPIS / Weise Verlag Munich
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