Natural blue topaz, by contrast, is irradiated over the course of eons; finding it in the ground is no easy feat. The largest blue topaz crystal in North America was found in Mason County in 1904 ...

Unlike the blue of mass-market topazes, the red of red topaz cannot be fabricated in ... Thrilled at the prospect of a unique addition to the Natural History Museum’s sizable inventory, the ...

The exhibit opens Wednesday and presents a unique opportunity to explore the natural beauty ... the full color spectrum of topaz, from the more common yellow and blue varieties to the rare and ...

The 21,000-carat light blue Brazilian Princess topaz lives at the American Museum of Natural History in New York, while the 31,000-carat reddish-orange El-Dorado topaz belongs to the Programa ...

Sir Michael Dixon, Director of the Natural History Museum, says, 'We are delighted to be able to display this exquisite blue topaz stone alongside some of nature’s finest mineral examples in this ...

A rare, fiery red topaz that's nearly 49 carats is now on display at the Smithsonian National Museum of Natural History. The giant gemstone called the Whitney Flame Topaz was privately owned for ...

A blue topaz stone, thought to be the largest-ever, is to go on permanent loan to the Natural History Museum in London. It has been handed over by the family of gemstone pioneer Max Ostro ...

A blue topaz stone, thought to be the largest-ever, is to go on permanent loan to the Natural History Museum in London. It has been handed over by the family of gemstone pioneer Max Ostro ...

LONDON (Reuters) - A flawless blue topaz gemstone, said to be the largest of its kind, is set to go on display at London's Natural History Museum. The Ostro stone weighs around 2 kg (4.4 lb) and will ...