The world's most-expensive Barbie doll featuring a West Australian diamond will be auctioned in New York with proceeds to benefit breast cancer research.
Australian jeweller Stefano Canturi designed a "Cubism" diamond-collar necklace featuring a rare 1-carat Australian Argyle pink diamond for one of the world's most-recognised dolls.
The centrepiece of Barbie's diamond collar is the pink diamond mined in WA.
Barbie by Stefano Canturi has been touring the world before her auction at Christie's in New York on October 20, where she is expected to sell for up to $US500,000 ($510,000).
Mr Canturi, who also designed his Barbie's outfit and hairstyle, said he wanted to donate 100 per cent of the profits from his Barbie auction to the Breast Cancer Research Foundation.