A diamond is the hardest known mineral that occurs naturally. It is basically an allotrope of carbon in which several carbon atoms are bonded tetrahedrally and it crystallizes into the face-centered cubic diamond lattice structure. Each carbon atom has four other carbon atoms joined to it by covalent bonds and so, diamond has a very strong 3D shape. This arrangement makes it hardest known mineral and hence, suitable for a number of applications. Diamonds offer high dispersion of light and this makes them very suitable for a number of industrial applications and for jewelry as well. Regular diamonds are put under specific pressure and temperature conditions to produce Type-II diamonds
http://ezinearticles.com/?Diamond---Uses-and-Properties&id=1268229 - Jun 22, 2008
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