The gems range from 7.61 to 14.33 carats in size. Many consumers know topaz as simply an inexpensive blue gem. They’re surprised to learn that its blue color is hardly ever natural: It’s almost always ...

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Auction house Sotheby’s unveiled a set of rare diamonds valued at $100 million in an exhibition center in Abu Dhabi on Tuesday. Among the jewels on display is the 10.03 carat Mediterranean Blue, ...

ABU DHABI, United Arab Emirates (AP) — A rare blue diamond was displayed Tuesday at an exhibition of $100 million worth of the world's rarest diamonds in the United Arab Emirates’ capital ...

A rare blue diamond was displayed on Tuesday at an exhibition of $100 million worth of the world’s rarest diamonds in the United Arab Emirates’ capital, Abu Dhabi. The eight diamonds on ...

A rare 23.24-carat vivid blue diamond, known as The Golconda Blue and once owned by Indian royalty, is set to go under the hammer at Christie’s Magnificent Jewels sale in Geneva, Switzerland. Mounted ...