General Information:
Chemical Formula:
(Fe++,Zn)4Sn2(Al,Fe+++)15O30(OH)2
Environment:
Pegmatitic rocks.
Locality:
Nigeria, Africa.
Name Origin:
Named after its locality.
Physical Properties:
Cleavage:
None
Color:
brown or reddish brown.
Density:
4.51
Diaphaniety:
Opaque
Habits:
Platy - Sheet forms (e.g. micas)., ,
Hardness:
8.5 - Chrysoberyl
Luminescence:
Non-fluorescent.
Luster:
Vitreous - Greasy
Streak:
grayish white
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