A fancy vivid blue diamond ring (est. $14-18 million) will be offered at a Sotheby's Geneva auction on November 15, 2017. Tristan Fewings / Getty Images for Sotheby's
A fancy vivid blue diamond ring (est. $14-18 million) will be offered at a Sotheby's Geneva auction on November 15, 2017. Tristan Fewings / Getty Images for Sotheby's

Get your jewellery valuated for free from a Sotheby’s gemstone specialist in Dubai