"Expensive" is relative and depends on what you consider expensive.
Every diamond is valued according to its colour, clarity, carat weight and cut: the 4 Cs.
Chocolate diamonds -- a commercial description of the most common colour of diamond: brown -- are generally believed to have been formed by ". . . nickel impurities and lattice defects associated with plastic deformation. . . . " according to the Wikipedia entry for Brown diamonds.
Generally, you'll pay less for a brown diamond that you would for any other colour of diamond, given that the other three qualities are equal.
No, chocolate diamonds are usually less expensive than regular -- white -- diamonds, given equal cut, clarity and carat weight.
Levian Chocolate Diamonds are mined in the Argyle mine of Western Australia. The Diamonds are only found in that mine. This is why they are pretty expensive.
'Chocolate diamonds' are named thus because this shade of brown diamond is the colour of chocolate. Some brown diamonds are natural diamonds; some brown diamonds are manufactured diamonds. A gemologist will help you determine the source of your brown diamond. Manufactured diamonds are always less expensive than natural diamonds with similar characteristics.
Generally yes. If two diamonds, with similar carat weight, similar clarity and similar quality of cut are compared, the brown diamond will generally be less expensive than a white diamond.
Given that all other measurements being equal: carat weight, clarity and cut -- a brown diamond will be less expensive than most any other colour of diamond. Brown diamonds are the most common colour of diamonds found. Some brown diamonds are named chocolate, based on being a specific shade of brown.
No, they are diamonds. They are called chocolate diamonds because of their brown color.
Some chocolate diamonds are mined in Australia and comparatively, they cost less than clear diamonds. Diamonds are graded by what is commonly referred to as the three c's. Cut, Colour and Clarity. The better the cut, colour (rather clearer and not included) and clarity the more expensive the diamond will become.
No form of chocolate contains diamonds.
'Regular diamonds' are diamonds described without colour. 'Chocolate diamonds' are brown diamonds that include a description of the colour.
Kentucky is not known for its raw diamonds, chocolate or otherwise.
No. Chocolate diamonds are made from carbon, like all colours of diamonds. The name just comes from the color and there is no cocoa inside them.
Brown diamonds are not rare, but diamonds are rare.