That's how Sotheby's Australia justifies the $700,000 to $1 million asking price for an extremely rare 0.82-carat fancy purplish red Argyle diamond ring to be auctioned in Sydney tonight, The ...

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 ...

An extremely rare 'fancy red' diamond from the Argyle mine in Western Australia's far north-east Kimberley regions has been sold for a record price to Glenn Bakker Jewels in Victoria.

Rio Tinto said on Friday it was putting up for sale the biggest "red" diamond ever produced by its Australian mine amid an "explosion" in demand from Asia for the rare pink-hued stones. By AFP 17 ...

Colored diamonds, particularly high-quality blues and pinks, have always commanded top dollar. But the recent action at the auctions and among high-end dealers indicates that — as often happens in ...