water and rocks
I have collected many desert rocks & some fossils lately, & I want to use them in a rock garden or water garden. The problem is they are different rocks (jade, obsidian, petrified wood, quartz) & I do not want to damage them. The wood is at least 12,000 years old & some of the ones I have not identified yet are much older than that. Will moisture or fertilizer solutions hurt these rocks?