That would not be aluminum....quarters before 1965 were made of mostly silver (90% silver and 10% copper to be exact).* They do make that distinct sound when they hit a desk, and if you look at the sides, they don't have the copper ring on them.* I have about 6 myself that I keep with my "collectables"* ie: wheat pennies, a buffalo nickel, indian head penny from 1901 (yes, it's probably worthless lol) and about $10 worth of bi-centenial quarters.* All of my other change gets put into a small jar for snacks at the machine at work, then if that gets full, it gets dumped into a bigger container for saving.* When that fills up then it gets taken to the bank, run through the coin machine and deposited into savings.* Paid a little for Branson this way.