General Information:
Chemical Formula:
(Ba,K)(Mg,Mn,Al)3Si2Al2O10(OH)2
IMA Status:
Approved IMA 1974
Physical Properties:
Cleavage:
[001] Perfect
Color:
yellow brown.
Density:
3.3
Diaphaniety:
Transparent to Translucent
Hardness:
2.5-3 - Finger Nail-Calcite
Luster:
Vitreous (Glassy)
Streak:
yellow white
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