I found some rocks while hiking today and I was wondering if I can put these in... They are like aridecent(spelling?) on the outside, like a whit blue.. I forgot what they call these rocks but does anyone know if I can put these in? If I took a pictures with my crappy webcam would anyone be able to tell?
glassy rocks are often formed from lava or magma (ingeous rocks, and i'm sure i misspelled that), obsidian for example, and are fine for aquariums. the only concern about obsidian is the razor-sharp nature of their edges.
yeah, post some picks if you can.
the real concern for a rocks' suitablity is the minerals they contain, and if they will disolve in water.