Photo MO-20 (M. Polliand, 1998). Same as photo MO-19. Observe the bluish anisotropy colour in boulangerite. Bayerland. Germany. Crossed nicols. 0.88 mm.
Copyright © 1999 Dept of Mineralogy. All Rights Reserved.
Photo MO-20 (M. Polliand, 1998). Same as photo MO-19. Observe the bluish anisotropy colour in boulangerite. Bayerland. Germany. Crossed nicols. 0.88 mm.
Copyright © 1999 Dept of Mineralogy. All Rights Reserved.
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