Rare diamonds

The rarest gemstones in the world are extraordinary treasures formed under rare geological conditions, making them highly sought after for t...

The 102.34 carat rock, cut from a stone mined in Botswana, has been hailed as the 'rarest white diamond' ever to come to market. It is on display at Sotheby's Diamonds in London.

Marvellous selection of exquisite and rare green and blue diamonds with variations in their tone, hue and saturation from Novel’s…

Rare 'diamond within a diamond' is unearthed in India and is named the 'Beating Heart'. This diamond is particularly rare because it feature...

View auction details, art exhibitions and online catalogues; bid, buy and collect contemporary, impressionist or modern art, old masters, jewellery, wine, watches, prints, rugs and books at sotheby's auction house

By Erika Winters An 8.41-carat fancy vivid purple-pink diamond is expected to fetch between $12.8 and $15.4 million at Sotheby’s Hong Kong. Image: Sotheby’s Sotheby’s Hong Kong will be auctioning […]

Diamonds which have not yet been cut are referred to as 'rough' or 'raw' diamonds. To identify whether the stone you have is a diamond, you can do a quick visual evaluation to rule out other gemstones. From there, you'll want to perform a...