Photo MO-23 (M. Polliand, 1998). Sphalerite (e.g., upper right), arsenopyrite (euhedral), Fahlore (in the center surrounded by galena), boulangerite (greenish and anisotropic mineral between galena and sphalerite, at the lower right corner), and galena (most reflective mineral), associated to carbonates with typical polysintetic twinning. Rävlidmyram. Sweden. Parallel nicols. 0.42 mm.
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