General Information:
Chemical Formula:
Ca(Zn,Cu++)(Fe+++,Zn)[(As+++++O3(OH)2](OH)3
IMA Status:
Approved IMA
Physical Properties:
Cleavage:
[???] Good
Color:
brownish yellow or yellow brown.
Density:
4.25
Diaphaniety:
Transparent to Translucent
Hardness:
3 - Calcite
Luster:
Adamantine - Greasy
Streak:
light yellow
More details...