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These mineral photos are copyrighted by their owners and may not be used without permission.
Comments: Black prismatic crystal clusters of crossite.
Location: near Valley Ford, Sonoma County, California, USA.
Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species
Comments: Long metallic, black, prismatic crystals or crossite on matrix.
Location: Webbing, Lammertal, Salzburg, Austria.
Scale: Picture size 2.5 mm.
© Tom Loomis / Dakota Matrix