A billion-year-old black diamond, believed to be the largest cut diamond on Earth, is going up for auction. There are competing theories about the origins of the gem, named The Enigma, including ...

There are competing theories about the origins ... Although the precise origin of black diamonds is shrouded in mystery. Black diamonds are usually around 2.6 to 3.2 billion years old - a time ...

These runs, like the famous Big Couloir, qualify as triple black diamonds because of the consequences—if you fall here, you might not stop for a long time. Or slide over a cliff. Yet, just because a ...

If Gabbriette’s engagement announcement was unconventional – “I love being in love,” she told Julia Hobbs in the August issue of British Vogue – then so too is the black diamond she’s now sporting ...