Why are certain diamonds so beautiful? they’re super-deep!
What do the 3,106 ct. Cullinan, the 1,109 ct. Lesedi La Rona, and Elizabeth Taylor’s Krupp have in common? In addition to being some of the most famous and valuable diamonds in the world, they’re all Type IIa, which means they have no measurable nitrogen or boron impurities and are therefore chemically pure.