Diamonds can range in color from clear to red and even blue. Most commonly, diamonds are colourless.
A diamond advertised with a 'CC' colour is a diamond advertised without a standard classification for its colour. The best colour grade for a 'colourless' diamond is 'D'. The advertiser may be able to explain this colour coding to you: no results are available using 'CC' as a query for a colour of diamond.
"The less colour present in a diamond, the higher will be its colour grade. Colour will naturally manifest in the diamond as a pale yellow, and that is why colour grade refers to this lack of colour. The human eye detects the sparkle of a diamond first and then its colour. This is the reason that colour is usually considered the second most important characteristic, after cut."
A 'gold-ish' coloured diamond is categorically a brown diamond, with a named colour, such as cognac or chocolate or other named colour for a brown diamond. Every diamond is valued by its cut, colour, clarity and carat weight.
The highest grade for 'white' diamond colour is D, not A. D is a higher grade than H in diamond colour.
Diamond colour is truly a perception -- although a measurable one. Natural diamond colours don't change, but the 'glory' of the natural colour can be affected by the gemstone's cut. Reflection and refraction are the keys to the perception of diamond colour, and if the cut is not of the best proportion, symmetry and polish, the gem's best colour cannot be perceived.
No natural diamond will change colour.
Your answer depends entirely on the diamond, its cut, carat weight, clarity and colour.
Brown is the most common colour of gem-quality diamond found. The colour is caused by the inclusion of nickel in its composition, or from irradiation. Plastic deformation is another potential cause for this colour.
A peridot is a peridot; a diamond is a diamond. They are different gemstones. If 'peridot' is used as a word to modify the description of a diamond, one might deduce that the diamond had a slight lime-green colour. Any diamond's value is based not only on its colour, but its cut, carat weight and clarity.
A diamond described as a 'gold' diamond may be a white diamond naturally coloured with a yellow colour, or may be a description for a light brown diamond. Gold is not a common description given for a coloured diamond.
Your price for any diamond depends on the cut, carat weight, colour and clarity of the diamond that you want to buy.
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