Is there a way to buy small amounts of pure gold for its exact value?

I know that you can buy gold by the ounce on the commodities exchange, but I don’t have over $1000 to buy an ounce of gold. Maybe I could buy a fraction of an ounce at a time.

It seems alot easier for me to save money when it is locked in a tangible asset that is hard to sell for its value. I would love to save bits and pieces of gold if I could.