mineral - a natural, inorganic solid material that is made of crystals and has a definite chemical composition, organic - is living or was once alive, inorganic - is not living and has never been alive, luster - the ability of a material to reflect light (shiny or dull), streak - the color of the powder of a mineral left behind when it is rubbed on porcelain, hardness - the measure of how easily a mineral is scratched, weathering - the breaking down of rock into smaller pieces by physical forces (wind, rain, etc), erosion - the movement of sediment by wind, water, ice, or gravity, deposition - the placing of sediments in a new location from where they were,

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