General Information:
Chemical Formula:(Zn,Mg,Fe++)(Sn,Zn)2(Al,Fe+++)12O22(OH)2
Environment:Pegmatitic rocks.
Locality:Nigeria, Africa.
Name Origin:Named after its locality.
Physical Properties: Cleavage:None
Color:colorless, amber yellow, golden brown, brown, or red.
Density:4.51
Diaphaniety:Opaque
Habits:Platy - Sheet forms (e.g. micas)., Hexagonal - Six-sided crystal shape in cross-section or habit., Anhedral Grains - Granular minerals without the expression of crystal shapes
Hardness:8.5 - Chrysoberyl
Luminescence:Non-fluorescent.
Luster:Vitreous - Greasy
Streak:grayish white
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