The most expensive Barbie in the world, with jewels designed by Australia’s Stefano Caturi, has been sold at Christie’s in New York for $302,500.

Mattel commissioned Canturi to create the finger-wide neckpiece and tiny matching ring to promote its new Barbie collection.

The jewellery set features a necklace made from three carats of white diamonds set around a one carat, square emerald-cut pink diamond.

Jeweller Stefano Canturi also designed the doll’s black strapless party dress, peep-toe stilettos and tumbling blonde hair.

A rare, two-stone ring set a new record price per carat for a blue diamond at auction when it sold for $15.7 million to an Asian collector.

The ring features a 9.87 carat colorless triangular-shaped diamond paired with a triangular 10.95 carat “Fancy Vivid” blue diamond, the largest such blue diamond of this cut ever offered at auction.

The jewel had been bought in Rome in 1972 for $1 million, which is the equivalent of about $5 million today, Christie’s auction house said.

Sotheby’s says it is auctioning about 3 million pounds worth of jewelry once owned by Wallis Simpson, the American socialite who became Duchess of Windsor.

Britain’s King Edward VIII, who renounced his claim to the British throne in 1936 to marry the divorcee, showered her with gifts of jewellery throughout their courtship and marriage.

The pieces on sale include a Cartier heart-shaped emerald, ruby and diamond brooch (above) commissioned in 1957 to mark their 20th wedding anniversary.

De Beers has created a special exhibition called “The Art of Diamond Jewelry” in the setting of world famous department store, Isetan, in Tokyo.

Running through July 21st, the exhibit in the city’s Shinjuku shopping district incorporates photography and multimedia, including a first of its kind 3D film about diamonds that is shown on a custom screen and requires no 3D glasses.

The film was created by Holition, a company that markets a 3D virtual reality application allowing customers to “try on” luxury goods such as watches.

Tina Barrat of Tina Barrat bijoux-couture, is a French-born, Hong Kong based designer. Her brand was launched in 1999 to international acclaim.

The brand is called “bijoux-couture” since her jewelry is comprised of original components and her jewels are incorporated together with fabrics, ribbons, lace, feathers, and other materials.

Tina is currently using a combination of feathers and natural components (such as mother-of-pearl) and the “couture” aspect remains very important to her work.

The Cartier and America exhibition covers the history of the House of Cartier from its early period as the “king of jewelers and jeweler to kings” during the Belle Epoque through to the 1960s and 1970s, when Cartier supplied celebrities with jewels and luxury accessories.