Some of the most important fancy colored stones sold at auction come from the depths of bank vaults. Estate jewellery is a small but prestigious source of extremely fine fancy colour diamonds, according to Gary Schuler, director of Sotheby’s New York jewellery department. “Yes,” he says, “people are coming in with things from their vaults. […]

Beyond the multitude of Argyle’s various shades of brown diamonds, yellow diamonds comprise the largest group of fancy colours available. According to Kimberley Diamonds Ltd. (KDL), which purchased the Ellendale diamond mine in Western Australia from Gem Diamonds in 2013, the mine supplies around 50 percent of the world’s fancy yellow diamonds, currently producing about […]

When it comes to pink diamonds, there is a reliable producer and a dominant one but the diamonds are relatively small. Rio Tinto’s Argyle mine in Western Australia yields 20 million carats of diamonds in an array of brownish tones. Occasionally, a pink diamond is discovered. Josephine Johnson, manager of Argyle Pink Diamonds, says, “Less […]

Blues of consequence are among the rarest of the rare among fancy colour diamonds. Since the Cullinan mine in South Africa was acquired by Petra from De Beers in 2008, it has produced six important blue diamonds. The most recent was the stunning 122.52-carat blue, recovered in June 2014, that sold this September for $27.6 […]