One whale's vomit is another man's treasure, or so it seems.
A dog walker in Wales happened upon an 8-inch lump of Ambergris—the scientific name for solidified whale yack—which is estimated to be worth a colossal £7,000 ($10,763), according to Mashable.
The smelly yellow-brown lump is formed in the digestive system of sperm whales and is often used in perfumes, making it quite valuable. This particular piece will be auctioned off on Sept. 25 by Adam Partridge auctioneers.
This isn't the first lump of Ambergris to make landfall. In 2006, an Australian couple found a piece of "floating gold" worth $295,000, according to BBC News.
However, not every smelly rock on the beach will fetch you a fortune. In 2013, a dog walker believed he found a piece of Ambergris worth more than $154,000. However, in March 2015, it was revealed that the solidified mass was just a rock.