Vinegar, an acid, dissolves bits of a material called calcium carbonate in the limestone. This releases carbon dioxide, a gas that rises to the surface as a stream of bubbles. Rocks that don't contain calcium carbonate won't fizz.How to clean rocks without damaging them?
Just using running water rarely cuts it, but the key is to remove dirt and build up without damaging the stones. There are a lot of ways to clean rocks and minerals, and each specimen is its own unique case.How do you make a fizzing rock?
Pour a half cup of vinegar into a glass. Add a small chunk of limestone rock. (Find limestone outside using a rock identification book or buy a piece at a hobby shop). Watch closely. After a few minutes the rock will start to fizz.How do you clean a crystal with vinegar?
Cover the specimens in vinegar and allow them to sit for a few days. Most of the time you’ll be cleaning up a quartz crystal or other silica mineral using this method so a brass brush can be used to remove loosed minerals. Vinegar can take a few days to work fully.