General Information:
Chemical Formula:
Ca2(Y,Ce)2Si4O12(CO3)·(H2O)
IMA Status:
Approved IMA 1987
Locality:
Island of Hiero, Vest-Agder, Norway.
Physical Properties:
Cleavage:
[???] Good
Color:
brown, colorless, green yellow, yellow, or light yellow brown.
Density:
3.4 - 3.6, Average = 3.5
Diaphaniety:
Transparent to translucent
Habits:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., ,
Hardness:
5-6 - Between Apatite and Orthoclase
Luminescence:
Non-fluorescent.
Luster:
Vitreous (Glassy)
Streak:
white
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