Mineral Name

Sphalerite

Chemical Formula

ZnS

Creator

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Color

brown, yellow, red, green, black

Class

Article

Luster

resinous, greasy to sub-metallic

Diaphaneity

transparent to translucent to opaque

Hardness

3.5-4

Cleavage

6 directions: {110} perfect, {110} perfect, {110} perfect

Fracture

uneven, flat surfaces

Density

3.9-4.2

Crystal Shape

found as tetrahedron, dodecahedron, and cube forms. Usually found in cleavable masses.

Crystal System

Isometric

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