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Comments: Brown masses of crystalline baotite in white quartz matrix.
Location: Inner Mongolia, Autonomous Region, China.
Scale: Picture size 2 cm.
© Tom Loomis / Dakota Matrix
Baotite: Ba4(Ti,Nb)8Si4O28Cl Columbite-(Fe): Fe++Nb2O6
Comments: Minute brown crystalline grains of baotite in dark ferrocolumbite (columbite-(Fe)).
Location: Sheep Creek, Ravalli County, Montana.
Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species