Black diamonds have a "poly crystalline" structure, which means it's kind of like many diamonds smashed together. Since they're all at different angles, and so you can't carve it to make sparkles. Instead, the light just gets absorbed, making it black.
It's still a pure carbon crystal, so they call it at "Carbon ado", but it is technically a diamond. Just not a very attractive one. Diamond stores generally sell them at about the same price as white diamonds as exotic diamonds, but they don't sell nearly as well because they're not very pretty.
Black diamonds are black.
You can buy black diamonds.
Black diamonds are diamonds, but they are black, and not transparent. Follow the link, below, to see photos of black diamonds.
yes black diamonds are rare in this region
Mother earth makes black diamonds.
Diamonds can be found naturally occuring in a range of colors, including black diamonds. They are not artificially made.
Black diamonds that are available in the market are usually low grade white diamonds that have been colored black, however, natural black diamonds can be expensive depending on the quality.
Lethbridge Black Diamonds was created in 1992.
Black diamonds are more rare than regular diamonds. They are one of the most rare species of colored diamonds.
Black diamonds -- properly Carbonado, are real diamonds, with our without enhancements. You can read more about Carbonado, below.
Natural black diamonds are rare. They are due to dark graphite inclusions. Their rarity makes them valuable. Most black diamonds are synthetic and made by heat treating low quality diamonds. The price of a synthetic black diamond is lower than that of white diamonds.
Black diamonds are usually used for jewelery when they are so identified. When not identified as such, they are probably used as industrial diamonds.