Silver How To Clean Silver And Gemstone Jewelry?

How to clean silver and gemstone jewelry? - silver

I have a silver and carnelian necklace. The silver is oxidized and I want to know how to clean without harming the carnelian. A silver cloth is the problem, because the neck is too detailed.

There is a method of cleaning soda for money concerns, you can hot water and aluminum foil, someone to me with detailed information on this and other means? Thank you.