Gold! Treasure lost at sea in 1857 is for Sale.!

More than $50 million worth of gold bars, coins and dust that's been described as the greatest lost treasure in U.S. history. It is about to make its public debut in California after sitting at the bottom of the ocean for more than 150 years.

The 3,100 gold coins, 45 gold bars and more than 80 pounds (36 kilograms) of gold dust recovered from the wreckage of the S.S. Central America steamship are now sitting in a makeshift laboratory just south of Los Angeles.

Bob Evans, the chief scientist on the original voyage that discovered the shipwreck and its treasure in 1988.It is now painstakingly cleaning each piece of gold by hand, soaking it in a solution and brushing off rust and grime that accumulated as the treasure sat 7,000 feet (2,134 meters) below sea level.

The Central America was laden with booty from the California Gold Rush when it sank in a hurricane off the coast of South Carolina in 1857. Four hundred and twenty-five people drowned and thousands of pounds of California gold were lost, contributing to an economic panic.

The gold is all for sale. Just one tiny coin alone could go for $1 million because of its combination of rarity and the history behind it.