As the head of jewelry in Asia for British auction house Bonhams, Graeme Thompson is used to handling beautiful diamonds on a daily basis. Yet he’s only ever held a red diamond once, about five years ...

The Winston Red Diamond will be unveiled April 1, along with the Winston Fancy Color Diamond Collection. The diamonds have been donated by Ronald Winston, son of well-known jeweler and gem collector ...

Shine a white light on the Hope Diamond and it will dazzle you with the brilliance of an amazing blue diamond. Shine an ultraviolet light on the Hope Diamond and the gem will glow red-orange for about ...

When he first saw the storied 5.05-carat red diamond – a gem colored “as if a drop of blood fell upon the hand of the cutter” – Douglas Kazanjian thought it was heaven-sent. Kazanjian, head of a ...