Whale Vomit is More Valuable Than Gold.

From the website:

Leon Wright and his wife took home a 14.75kg lump of ambergris, found in the innards of sperm whales and used in perfumes after it has been vomited up.

Sought after because of its rarity, ambergris can float on the ocean for years before washing ashore.

Worth up to $20 a gram, Mr Wright's find on a South Australian beach could net his family US$295,000 (£165,300).

Gold, on the other hand, is only about $18 per gram! Link