How to clean dry rock

[LeonardTheWrasse]

Hi, I've been reading up on how best to clean some dry rock I have sitting outside. Not pressured for time or anything, but I'm not sure of the best method to use. I was thinking of using muriatic acid and soaking the rocks in that, then leaving them out in the sun for a couple days. However, I haven't found any muriatic acid in Aus, all I've seen is hydrochloric acid.
I've read that hydrochloric acid and muriatic acid can be used interchangeably, is this true?
Thanks

 

[Spare time]

You could always soak it n hydrogen peroxide then rinse it off if you want to avoid the dangers of the acid.

 

[TrottingReef]

If you want to kill all organics stored in the rock, soak it in a 1:10 bleach/water solution for a week. Then drain and lay all the rock out to dry. Leave to dry for a few days. Bleach breaks down harmlessly when it dries.