T he Okavango Blue Diamond, a dazzling 20.46-carat stone, is more than just a beautiful jewel-it's practically a miracle of nature. Unearthed from the Orapa mine in Botswana, this rare gem has ...

The boron-doped diamond lattice remains transparent, with a blue hue. (The famous Hope Diamond is blue because it contains small amounts of boron). Because of its other unique properties—it's ...

The cushion-shaped brilliant-cut blue diamond with VVS1 clarity is ... as well as important diamonds, colored gems and pearls. The collection totaled more than $2.6 million, with all the lots ...