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Anthophyllite: [ ]Mg7Si8O22(OH)2 Magnesioanthophyllite: (Mg,Fe++)7Si8O22(OH)2
Comments: Schistose amphibolite rock composed primarily of anthophyllite (magnesioanthophyllite is now considered to be anthophyllite).
Location: Winchester, Riverside County, California, USA.
Scale: See Image.
© Rruff Database
Anthophyllite: [ ]Mg7Si8O22(OH)2 Biotite: K(Mg,Fe++)3[AlSi3O10(OH,F)2
Comments: Fibrous mass of anthophyllite as a shell around biotite.
Location: Hermanov, Severocesky, Czech Republic.
Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species