Click on thumbnails for a larger image. Please be patient since some of these pages of thumbnail images take some time to load. These mineral photos are copyrighted by their owners and may not be used without permission.
Gillespite: BaFe++Si4O10 Bigcreekite: BaSi2O5·4(H2O) Sanbornite: BaSi2O5
Comments: Tiny white, spherical patterns, halo-like crystals of bigcreekite to about 0.5mm and reddish gillespite in a matrix of pale yellowish sanbornite. Location: Trumbull Peak, Mariposa Co., California, United States. Scale: 2.5 x 2 x 2cm. © Tom Loomis / Dakota Matrix
Gillespite: BaFe++Si4O10 Anandite: (Ba,K)(Fe++,Mg)3(Si,Al,Fe)4O10(S,OH)2
Comments: Black micaceous anandite with dark red gillespite. Location: Esquire No. 7 Claim, Big Creek, Fresno County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Gillespite: BaFe++Si4O10 Pellyite: Ba2Ca(Fe++,Mg)2Si6O17
Comments: Red crystalline gillespite with yellow pellyite rock matrix. Location: GUN claims, Itsi Mountains, MacMillan Pass Area, Yukon Territory, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species