General Information:
Chemical Formula:Ba4(Fe+++,Ti,Fe++,Mg,V+++)4(B2Si8O27)O2Clx x=0 to 1
Environment:A contact-metamorphic mineral.
Locality:Candoglia, in the Toce Valley, Piedmont, Italy
Name Origin:Named for Torquato Taramelli (1845-1922), Italian geologist.
Physical Properties: Cleavage:[010] Perfect
Color:reddish brown, bronze purple, or brownish violet.
Density:3.9 - 3.92, Average = 3.91
Diaphaniety:Translucent to subtranslucent
Habits:Fibrous - Crystals made up of fibers., ,
Hardness:5.5 - Knife Blade
Luster:Vitreous - Resinous
Streak:brown
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