While it may look like a blazing red ruby, the 2.33-carat Winston Red Diamond is just that—a diamond. One of the rarest diamonds in the world, the Winston Red Diamond is on display at the Smithsonian ...

Drake bought Tupak Shakur's gold, ruby and diamond crown ring for just over $1 million. The one-of-a-kind bauble was on offer this week at Sotheby's. ... the other red — valued at $300,000 apiece.

(The crown has gone through several reincarnations since the restoration of the monarchy in 1660). Though it is known as the Black Prince's Ruby, it is, in fact, a 170 carat red spinel.