http://www.opencurrency.com/3-quick-ways-to-help-tell-real-silver-from-fake-silver/
I personally had to go try the ice test! I placed an ice cube on a one ounce silver coin and compared it to another ice cube placed on a normal plate. The ice on the silver definately melted faster at first, but slowed its rate of melt once the silver cooled down to match the temperature of the ice. This would be interesting to try with a large bar of silver to see just how much faster the ice melts compared to the control ice.
I personally had to go try the ice test! I placed an ice cube on a one ounce silver coin and compared it to another ice cube placed on a normal plate. The ice on the silver definately melted faster at first, but slowed its rate of melt once the silver cooled down to match the temperature of the ice. This would be interesting to try with a large bar of silver to see just how much faster the ice melts compared to the control ice.