“The Spirit of the Rose” set a record auction price for a purple-pink gem at Sotheby’s Geneva.
Dale Vince says his SkyDiamond’s will be the world’s first carbon-negative stones.
Each diamond on the watch trio was placed by hand.
The timepiece has 85 different geometric cuts to its icy bling.
The world’s top producers are saddled with billions of pounds in extra diamonds.
They’ll only set you back around £40 million.