Other than the Francis bacon's Bullfight and a rare 710-year-old copy of the Magna Carta, up for auction at Sothbey's will be a nearly 9-foot-tall, stainless- steel heart by Jeff Koons. Valued at about $20 million, it could set an auction record for..

While the Christie's auction starting 16th of October will embrace magnificent jewels from all around the world, an 8ft (2.5 meter) sculpture of a diamond by US artist Jeff Koons is anticipated to fetch around $12m (£6m) when it is sold at Christi