General Information:
Chemical Formula:
(Na,Ca,K)6(Si,Al)12O24[(SO4),(CO3),Cl2]2-4·n(H2O)
Physical Properties:
Cleavage:
[1010] Perfect, [0001] Indistinct
Color:
colorless, yellow, white, light blue, or light gray.
Density:
2.32 - 2.42, Average = 2.37
Diaphaniety:
Transparent to Translucent
Hardness:
5-6 - Between Apatite and Orthoclase
Luster:
Vitreous - Pearly
Streak:
white
More details...