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Monday, 2 February 2015

The Diamond

the diamonds\


Diamond is the cubic modification of carbon and as a naturally occurring solid mineral from the mineral class of elements. Diamond usually forms octahedral crystals, often with curved surfaces and streaky. Other forms observed are the tetrahedron, dodecahedron and the cube. The crystals are transparent, colorless or colored by impurities (eg., Nitrogen) or crystal lattice defects green, yellow, brown and rarely, orange, blue, pink, red or gray to black.

Diamond is the hardest natural substance. In the Moths hardness scale, he has the hardness of 10. His abrasive hardness Roswell (also absolute hardness) is 140 times greater than that of corundum. The hardness of the diamond is, however, different in different crystallographic directions (anisotropy). This makes it possible to grind diamond. In the diamond powder used for this purpose, the crystals are in any orientation before (statistical isotropy) so always worked the hardest of them on the body to be ground.


Diamond is optically isotropic with high refraction and high dispersion. He shows fluorescence and phosphorescence and is turboelectric. It has the highest thermal conductivity of all known minerals.