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SCI245Week One Assignment - minerals

SCI245Week One Assignment - minerals - Luster is the way a...

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Week One Assignment Minerals Summary The purpose of this summary is to identify the four requirements for a material to be classified as a mineral, to explain how to differentiate between minerals and six methods to tell minerals apart, and to summarize the major difference between minerals and rocks. To be classified as a mineral, a material has to be a solid with occurs naturally with crystal structure. All minerals have a specific chemical composition and are formed by inorganic processes. There are six methods used to tell minerals apart, they are; luster, crystal form and habit, hardness, cleavage, color and streak, and density.
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Unformatted text preview: Luster is the way a material reflects light, crystals form with planar surfaces or facets, and a minerals habit is its distinctive shape. A minerals hardness is determined by scratching and cleavage is a breakage surface which is smooth. Color is the observed color of the mineral and streak is more reliable form of color identification, obtained by rubbing the material on a streak plate to see the true color. Density is how light or heavy a material feels. The major difference between minerals and rocks is that rocks are aggregates, which means that they are made up of minerals and or other materials stuck together....
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