General Information:
Chemical Formula:
(Ce,La,Nd,Y)2Fe++Be2Si2O10
IMA Status:
Approved IMA 1987
Physical Properties:
Cleavage:
None
Color:
black.
Density:
4.2
Diaphaniety:
Transparent
Hardness:
6.5-7 - Pyrite-Quartz
Luster:
Vitreous (Glassy)
Streak:
greenish gray
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