Hendricksite

General Information:
 Chemical Formula:
K(Zn,Mn)3Si3AlO10(OH)2
 IMA Status:
Approved IMA 1966
Physical Properties:
 Cleavage:
[001] Perfect
 Color:
copper brown, red, or reddish black.
 Density:
3.4
 Diaphaniety:
Translucent
 Hardness:
2.5-3 - Finger Nail-Calcite
 Streak:
red brown
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