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Properties of Minerals To identify minerals, mineralogists observe the following properties a .Color - mineral's color may change depending on the surface. b. Streak color of mineral in powdered form. c. Hardness minerals resistance to scratching.
Mohs Scale of Hardness (Diamond is the Hardest with a scale of 10) 10 Diamond 9. Corundum 8- Topaz 7- Quartz 6-Orthoclase 5- Apatite 4-Fluorite 3-Calcite 2- Gypsum 1- Talc
d. Cleavage-mineral's resistance to being broken and fracture e. Crystalline structure or liabit f. Diaphaneity/amount of transparency - ability to allow light to pass through it. This is affected by chemical makeup of the mineral sample. g. Luster how light is reflected off a surface h. Tenacity - describes the minerals reaction to stress.
Brittleness- a mineral turns into powder Malleability a mineral can be flattened by pounding with a hammer.
Ductility- A mineral can be stretched into wire. Flexible but inelastic-Minerals are bent but they remain in the new position.
Flexible and elastic- Minerals are bent, and they bring back to their original position. Sectility- ability of minerals to be sliced by a knife.
Sagot :
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