The market for coloured gemstones is on fire, with pink diamonds, rubies and sapphires achieving record prices and experts predicting a sharp increase on demand next year to last a decade.
Only last month, Sotheby’s set a new world record for a ruby when it sold an 8.62-carat Burmese stone for US$8.4 million (8.2m Swiss francs). The auction house also set a new world record for sapphires at a recent auction in Hong Kong.
But what makes diamonds have a colour? Canadian diamond retailer Excalibur Royale created the following infographic explaining this, and more.