Industrial demand for silver is pushing the metal's price higher.The price of silver broke a record this week, exceeding $60 an ounce. The white metal has more than doubled in value this year, from about$30 an ounce to over $63 today.And funds that provide investors with exposure to physical silver, like the iShares Silver Trust (SLV 2.64%), are up with the price of the precious metal. The silver exchange-traded fund (ETF) tracks the silver spot price using silver bullion held in JPMorgan Chase bank vaults ...