In a historic discovery, a 2,492-carat diamond has been unearthed at Botswana’s Karowe Mine, the largest diamond found in ...

In the age of private sales and auction-house theatrics, the old metrics of diamond value—cut, clarity, carat and color—are only the opening act. True connoisseurs are chasing rarity, provenance ...

The Golconda Blue diamond, a rare gem from India, will be auctioned in Geneva. This 23.24-carat diamond has historical ... With more than two and a half centuries of auction history, it has ...

It’s this brilliant reinvention of how to wear antique jewels in a modern way that feels very Cartier.” Divided into three ...

A curator of the Victoria and Albert Museum’s “Cartier” exhibition explains how the jeweler’s “elegance” and “discretion” led ...

One of her most standout designs is her Patek Philippe watch, of which she has two different Nautilus ... to the star in 1998 with a three-carat marquise-cut diamond ring set on a yellow gold ...

Chip Clark The Blue Heart Diamond, cut from a 100-carat stone found at the Premiere ... anywhere from one to three billion years old, a time when the earth was probably hotter than it is today ...

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Diamonds and other gemstones are weighed in metric carats: one carat is equal to 0.2 grams, about the same weight as a paperclip. (Don’t confuse carat with karat, as in “18K gold,” which refers to ...

Established in 1931, the Gemological Institute of America (GIA) is the world’s foremost authority on diamonds, colored stones, and pearls. A public benefit, nonprofit institute, GIA is the leading ...