Orthoclase, Riebeckite (Var: Crocidolite)

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An excellent, old-time cluster of sharp, off-white, lustrous orthoclase crystals to 1.4 cm mostly covered with fibrous, blue-green crocidolite. Crocidolite is a fibrous form of riebeckite, an amphibole group mineral. The old, paper label is glued to the back. Ex Richard Hauck Collection. 6.1 x 4.4 x 2.8 cm