The eight properties used to identify minerals are color, streak, luster, hardness, cleavage, fracture, specific gravity, and crystal form. Color is the visible hue of the mineral, while streak refers to the color of the powder it leaves on a surface. Luster describes how light reflects off the mineral's surface, and hardness measures its resistance to scratching. Cleavage and fracture indicate how a mineral breaks, specific gravity assesses its density, and crystal form refers to the geometric shape of its crystals.
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