General Information:
Chemical Formula:
(Ca,Ce)(Ce,La,Nd,Dy)Mn++2AlSiO4Si2O7(OH,F,O)2
IMA Status:
Approved IMA
Physical Properties:
Cleavage:
[001] Good
Color:
brown or dark brown.
Density:
4.05
Diaphaniety:
Transparent
Hardness:
5 - Apatite
Luster:
Vitreous (Glassy)
Streak:
brownish
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