Top ruby now requires a cert that says “pigeon’s blood.” Gem author David Federman has a better idea.

One of these rings will sell for twice the other: $50 million. Hint: it’s the canvas one.

This 17.16 carat Kashmir sapphire ring set a new world record sapphire price at Sotheby’s Hong Kong.

This 8.41-carat fancy vivid pink is the most expensive diamond in the world.