Mila Kunis, star of “Black Swan” and “Ted,” has signed a new deal as global brand ambassador for precious stone specialist Gemfields.

Owners of the world’s largest cut emerald – a 57,500-carat natural wonder – will auction off the gem later this month, and the bidding starts at $1 million.

The gem – called Teodora, or gift of God, in Portuguese – was mined in Brazil and sold to an Indian buyer, but little is known of the stone’s origins.

Teodora weighs 11.5 kilograms. It is actually the fifth largest emerald ever found but the biggest that’s been cut with facets.

A massive uncut emerald on exhibit in Colombia’s capital is being touted by its owners as the biggest in the world, officials said Saturday.

The 11,000-karat raw green gem weighs in at 2.27 kilos (almost five pounds) and is on show in Bogota 12 years after it was mined in Muzo, in the South American nation’s emerald country in Boyaca province.

“It is priceless,” Santiago Soto, spokesman for the Minergemas 2011 gem industry trade fair under way in Bogota, said of the stone owned by the firm Coexminas.

A dazzling tiara featuring emeralds believed to have belonged to Eugenie, wife of Napoleon III, sold for a record 11.28 million Swiss francs ($12.80 million) to an anonymous buyer at Sotheby’s.

The diamond and emerald tiara was commissioned by German prince Guido Henckel von Donnersmarck’s for his second wife Katharina.

It was top lot at a sale that netted 78.9 million Swiss francs, third highest for a jewellery sale, the auction house said.

Geoffrey Parker, London-based maker of the finest games on the globe, is offering the world’s most expensive poker set for $7.5 million, Justluxe reports.

The bespoke set comes housed in a genuine alligator skin case finished in any color the client chooses, fitted with 18k white goldcombination locks and hardware.

The case’ suede lining features an 18k gold and diamond frame holding 384 18k white gold chips, each inlaid on both sides in shagreen (stingray skin).

Gemfields has officially announced the discovery of an absolutely enormous rough emerald earlier this month in their Kagem mine in Zambia.

The emerald has been named “Insofu,” which means ‘elephant,’ by the indigenous Bemba people to both honor its size and pay tribute to the World Land Trust’s “Wild Lands Elephant Corridor Project.”

The emerald weighs in at 6,225 carats and is currently under the scrutiny of experts to determine its value and evaluate what possible futures it might have.