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Hendricksite: K(Zn,Mg,Mn)3Si3AlO10(OH)2 Celsian: BaAl2Si2O8
Comments: Gray massive celsian with dark red hendricksite. Location: Franklin, Sussex County, New Jersey, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Hendricksite: K(Zn,Mg,Mn)3Si3AlO10(OH)2
Comments: Reddish black hendricksite crystal in cream-colored willemite. Location: 'Mill Site', Franklin, Sussex County, New Jersey, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species