Fancy color diamonds are exceedingly rare, only 1 in 10,000 carat diamonds are supposed to exhibit a color that is strong enough to qualify them as ‘fancy color diamond’. They can be literally any shade of the rainbow and everything in between, based on the presence of elements that interact with carbon during formation.
It’s fascinating to think of the importance of the geographic origin of fancy colored diamonds; for example, yellow diamonds were first discovered in South Africa, and pink diamonds, in Australia. The specific formation conditions are directly related to the elements present in the earth.
It is recommended to buy a ‘fancy color’ diamond which has been certified by a gemological lab like GIA to know the origin of color. Most of them are a mixture of more than one color, but each one is exquisitely unique and one of nature’s most beautiful creations.