Here's a 5"x7" downloadable/printable for a how to clean jewelry with little effort.
Please note that soft stones/pearls/opals should be okay. Personally I would do pearls but I would risk opals. Do at your own risk on those. Everything else is fair game!

To Download to your computer→ Right click on pic → click on 'Save image as' → decide where on your computer you want to save it (usually under pictures or documents.)