Amstallite

General Information:
 Chemical Formula:
CaAl(Si,Al)4O8(OH)4·((H2O),Cl)
 IMA Status:
Approved IMA 1985
Physical Properties:
 Cleavage:
[???] Good
 Color:
colorless.
 Density:
2.4
 Diaphaniety:
Transparent to Translucent
 Hardness:
4 - Fluorite
 Luster:
Vitreous (Glassy)
 Streak:
white
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