General Information:
Chemical Formula:
(Na,K)6(Y,Ca)2Si16O38·10(H2O)
IMA Status:
Approved IMA 1987
Locality:
MT.ST.HI
Physical Properties:
Cleavage:
[010] Perfect, [001] Good, [100] Distinct
Color:
colorless, greenish, gray, gray white, or white.
Density:
2.42
Diaphaniety:
Transparent to Translucent
Hardness:
3.5 - Copper Penny
Luminescence:
Fluorescent.
Luster:
Vitreous - Silky
Streak:
white
More details...