He plans to marry long-time girlfriend and pediatric nurse Lindsay Schweitzer.
She's engaged to businessman Daniel Fryer.
It was discovered at the celebrated Cullinan Mine.
More than 5,000 specimens sourced from 95 countries will be featured.
A case containing 36 diamond semi-mounts was left in a Long Island Rail Road car.
The gem is often called 'emerald by day and ruby by night.'
It's 'the most valuable gold coin minted by the United States ever sold at auction.'
It would be able to interpret hand gestures.
Bids will start at $2M but could go much higher.
She's engaged to venture capitalist Alexander Gilkes.
'The diamond endures as the ultimate expression of love and commitment.'
It's a 14.83-carat fancy vivid purple-pink gemstone.
It's 'still in mint condition after 2,000 years.'
It was delivered via drone.
It was found at the Letšeng mine in the southern African kingdom of Lesotho.
She's 'absolutely obsessed' with the sparkler.
The center stone is a diamond of 8 to 10 carats.
He sold 2 crystals weighing a combined 75,000 carats.
The mystery had sparked a mini gold rush in the Rocky Mountains.
The bride-to-be planned the moment with the help of two soccer teams.