What does the 962 mark that is stamped into a piece of silver manufactured by the Monarch Silver Company mean?

Well, honey, that 962 mark on a piece of silver from Monarch Silver Company means it's made of silver that's 96.2% pure. It's basically the silver equivalent of finding a diamond in the rough - valuable and worth holding onto. So, if you've got something with that mark, you've hit the jackpot in the silver world.