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Knowing Black And Pink Diamonds
By http://www.diamondhome.info

Black diamonds have been around for a long time, and in the last few years have started to be marketed and promoted, making them start to be fashionable. Of all the colours for diamonds, we consider black to be the least attractive for a number of obvious reasons, and a few less obvious ones.

A black variety of diamond, found in Brazil, and used for diamond drills. It occurs in irregular or rounded fragments, rarely distinctly crystallized, with a texture varying from compact to porous. Some of the denser, less flawed carbonado can be polished, but usually makes stones with badly flawed surfaces. In addition, much of it is gray or dark gray rather than black, which tends to make it even less attractive.

Black diamonds found in only a few places on Earth may have crashed down from space in

a kilometre-sized rock, according to new research.

A colorless diamond is comprised of pure carbon, while colored diamonds have a chemical variation that affects how the stones reflect light, resulting in different hues. Other factors, such as radiation present during formation or twists in the crystal structure of the stone can also affect a diamond's color.

While gemologists are certain of what causes certain shades - boron, for example, creates blue stones - they haven't yet discovered what creates pink shades. Pink is one of the rarest colors of diamonds, and commercial quality stones are only found in the Argyle Mine in Australia, making them even more mysterious and sought after.

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