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Tennantite: (Cu,Fe)12As4S13 Schaurteite: Ca3Ge++++(SO4)2(OH)6·3(H2O)
Comments: Bright white silky fibrous schaurteite on dark tennantite. Location: Tsumeb, Oshikoto, Namibia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Tennantite: (Cu,Fe)12As4S13
Comments: Micro-quartz coated, dark gray tennantite on quartz. Former Sussman Tsumeb specimen. Location: Tsumeb, Namibia. Scale: Crystal size 5 cm. © John Schneider
Tennantite: (Cu,Fe)12As4S13 Calcioandyrobertsite-1M: KCaCu5(AsO4)4[As(OH)2O2]·2(H2O)
Comments: Vein of blue calcioandyrobertsite in massive dark gray tennantite. The vein of calcioandyrobertsite extends for 0.8cm. Location: Tsumeb Mine, Tsumeb, Namibia. Scale: Specimen size 1.1 x 0.5 cm. © John Veevaert
Comments: Crystals of dark gray tennantite on white quartz. Location: Concepcion del Oro, Zacatecas, Mexico. Scale: 6 x 5.5 cm. © Fabre Minerals