Mineral, any naturally occurring homogeneous solid, Streak, the color of a mineral when powdered, Moh's Scale of Hardness, Hardness is measured scale, Cleavage, Minerals that break along well-defined, Fracture, Minerals that break in a irregular pattern, Color, Poor property to rely on for mineral identification, Hardness, Resistance of mineral to scratching, Luster, Ability of a mineral to reflect light

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