Is black diamond rare?
Fancy black diamonds and Carbonados are both extremely rare. Only one in 10,000 natural diamonds are colored diamonds and only a portion of these colored diamonds are black. Because of their scarcity, natural black diamonds and Carbonados are the some of the most valuable and most costly.
Is there a red diamond?
Red diamonds are so rare that a shockingly low number of pure red diamonds actually are known to exist. Currently, only 20-30 pure red diamonds have been found, and most of those diamonds are less than half a carat in size. The expense of a red diamond is not just prestige.