Template:Sphalerite

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Sphalerite
Chemical composition (Zn,Fe)S
Crystal system Cubic
Habit tetrahedral or dodecahedral
Cleavage perfect, dodecahedral
Fracture edit me
Hardness 3.5-4.0
Optic nature isotropic
Refractive index 2.368 - 2.371
Specific gravity 3.95-4.10
Lustre Metallic to Vitreous