Spending on that special outing is expected to total.7 billion, with jewelry spending coming in next at.3 billion, the survey said.

The FBI, which tallies the theft of precious metals and jewelry in one category, says $1.6 billion was stolen in 2010, up 51 percent from 2005.

Theoretical physicist Richard Feynman was a huge fan and called it a "jewel" and a "remarkable" formula.