Lower-quality stones saw a gentler decline, with prices of round, 1-carat, D to H, SI diamonds slipping 3.5% in September.

In November, a 300-carat necklace will be auctioned off at Sotheby's auction house in London. The stones in the necklace may have come from a necklace that belonged to Marie Antoinette. The jewelry ...

A rare 300-carat diamond necklace worn by a noble at Queen Elizabeth II’s coronation will be auctioned. According to The ...

A visitor to the Arkansas Crater of Diamonds State Park left with a 2.3-carat diamond to commemorate the trip.

(IDEX Online) - A 17.97-carat Burmese ruby is to be offered with a $4.8m to $5.5m estimate by Phillips Geneva, together with a 3.24-carat fancy vivid blue, internally flawless diamond ($4.8m to $6m).

Weighing 300 carats - the rare diamond necklace was made in the decade before the 1789 French Revolution. Made up of three rows of diamonds with diamond tassels at each end, the piece has gone on ...

A rare diamond necklace, rumoured to have links with the French royalty, is making headlines as it heads to auction at the end of October after a 50-year absence from the public eye. Sotheby's has ...

GENEVA, Switzerland (CNN Newsource/WKRC) - A 200-year-old, 300 carat diamond necklace that saw two royal coronations could fetch millions at auction. According to Sotheby's auction house ...

From 600m to 750m they estimate it contains 1.17million carats. The largest gem ever found is the Cullinan Diamond - a 3,106 carat diamond discovered at the Premier No.2 mine in Cullinan ...

MURFREESBORO, Ark. – A visitor to the Arkansas Crater of Diamonds State Park left with a 2.3-carat diamond to commemorate the trip. Park officials said the unnamed visitor arrived at the park at its 8 ...

The majority of diamonds used in fine jewelry weigh one carat or less ... and rounded to a hundredth of a carat. Diamond weights greater than one carat are expressed in carats and decimals. (For ...