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 ...

In the fall of 2016, workers at Rio Tinto’s Argyle mine in Western Australia discovered an extraordinary 4.38-carat rough diamond that appeared to glow like a red ember. Next month, a radiant-cut gem ...

From brilliant blues to fiery reds, discover how nature crafts diamonds in every color, and why some shades are rarer than the rest Emma Saaty Selections from the Winston Fancy Color Diamond ...

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 ...

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 ...