I soaked a large jar full of pebbles (from a river) in bleach water for a couple of years and the rocks came out super smooth and shiny when dried. I have tried to repeat this process again but am not having any luck with it this time. Have you ever heard of this and do you know if there is a certain ratio of water to bleach that works? Perhaps I put something else in the water the first time and caused a chemical reaction?
Here is a picture of the rocks that became smooth and shiny after a couple of years in water with bleach added for keeping the water clean and clear. And a picture of the rocks I have done the same to for a year. An interesting note is that fossils such as Petoskey Stones do not change at all.