The 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 diamonds can range from clear to very deep blue," Martoia said. "The more boron, the deeper the blue." She added that it's impossible to predict the exact color a memorial diamond will take on.

The cushion-shaped brilliant-cut blue diamond with VVS1 clarity is mounted on a platinum ... The two main diamonds were oval brilliant-cut diamond pendants of 10.10 and 10.08 carats, each D-color and ...

It was the disappearance of one piece in particular that caused consternation, however: a rare 50-carat blue diamond the size of an egg. Only about 1 in 10,000 diamonds has a distinct body colour ...

Rick Leavitt raced his dirt bike across the desert with his cousins when he visited their Blue Diamond home as a child in the 1950s. Later, he mined for gypsum atop the hill at the edge of Red ...

A Thai cleaner working for a Saudi prince took the gems in 1989. A rare 50 carat blue diamond was never recovered. Three Saudi diplomats were shot dead in Bangkok following the theft. Several top ...