Can I bleach rock?

[Yemeyana]

The rocks are out of a garden, so despite scrubbing have a little green left on them. Could I bleach them to give them a better appearance? It is a desert setup for a hognose snake.

If so, how would I go about bleaching them?

[cuervo25_1]

I know this is old but maybe this will help someone else. a muratic acid/ water solution should work. try a small drop from a plastic dropper on an unseen part. if it dont discolor the rock or have a bad reaction scrub it with a toothbrush and the solution. when done rinse the rock with water then soak it in a baking soda/water solution to neutralize any left acid on the rock or in crevices.Make sure you do it outside due to the fumes preferably on a bare clay spot,clay will also neutrilize the acid and will not react to the acid.

Muratic acid is some nasty stuff so please wear rubber gloves,rubberized coat and pants, face shield AND safety goggles also have a water hose near by in case you do get some on you. when I worked for a masonry company and we washed the brick walls when we was done the owner was right there making sure we did everything with protective gear on and as a safety measure in case something happened.

[Yemeyana]

Thanks for the reply! Actually I have just finished bleaching them when I read it...
I'm sure I'll be doing similar projects in future, so this will be useful.