Stephen Atkinson, an Australian beachcomber, is hoping to strike it rich with a lump of sperm whale vomit he found near Melbourne on the south coast.

More properly called ambergris, it is apparently rare and highly valued by perfume makers. The 7-kilogram lump could fetch more than 100,000 Australian dollars.

The ambergris, which is lighter than water, might have bobbed in the Southern Ocean for more than a decade after being coughed out.