“Boulangerite in galena from Sala Silvergruva
The middle part of this rock is covered with a patch of gray metallic boulangerite. To the right is pure coarse massive galena, the red spots are just reflections of a brick house nearby.
The grayish green mineral that makes up most of this rock is diopside with patches of galena.
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Göran Axelsson - 19th October 2017