Which of these is a chemical property used to identify minerals? O A. Reactivity
O B. Color
O C. Luster
O D. Hardness

Properties that help geologists identify a mineral in a rock are: color, hardness, luster, crystal forms, density, and cleavage. Crystal form, cleavage, and hardness are determined primarily by the crystal structure at the atomic level. Color and density are determined primarily by the chemical composition.

I don’t know if this is correct or not.

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