Brown Diamonds
As one of the most popular gemstones to make the trend scene, brown diamonds summon images of luxury and pleasure with names like champagne, chocolate, and cognac. Browns are the most plentiful colored diamonds mined, accounting for 80% of the yield unearthed at Australia's Argyle mine. The brown color is caused by internal parallel grain lines in the diamond.
Yellow Diamonds
Yellow Diamonds contain trace elements of nitrogen, and are the second most abundant fancy-color diamond. Hgihly-saturated yellow stones are the most desirable color.. You will sometiems hear yellow diamods referred to as "canary", though this is not an accepted term used in grading yellow diamonds.
Pink Diamonds
The pink color ranges from soft, clear pink to reddish purple. Pink diamonds get their color from graining inside the crystal; the more graining the more color. This can also produce red diamonds, though they are extremely rare.
Blue Diamonds
Also quite rare, blue diamonds are caused by boron impurities in the crystal - the more boron, the deeper the hue. Blue diamonds have traces of grey, so they never approach the deep saturated color of sapphires.
Green Diamonds
The presence of radiation causes green diamonds, which can happen when diamonds form near radioactive rocks. The green color is mainly in the surface, not through the entire stone. Natural green diamonds are very rare, low in saturation and somewhat greyish.
