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Rasvumite: KFe2S3
Comments: Reddish brown micro crystals of rasvumite in vugs to about 0.75mm. Location: Kirovskiy mine, Khibina massif, Kola Peninsula, Russia. Scale: 3.5 x 2.5 x 2.5cm. © Tom Loomis / Dakota Matrix
Comments: Opaque dull orange fibrous rasvumite masses. Location: Coyote Peak, Humboldt County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species