Abstract Rock Garden

[kittyhazelton]

I have this idea for a fish tank. I want to do some kind of abstract modern-art type theme.
My idea for decor is a few nice big peices of rock or other type of crystal/geode. There is a gem store in my area that has a very wide variety of cut stones/crystals/rocks.
I am wondering what kinds of stones would be safe/unsafe for an aquarium. are there some common types of minerals that I need to stear clear from?
As much help as possible would be apreciated.

 

[ewurm]

Stick to igneous or metamorphic rocks, avoid most sedimentary rocks. You can test compatibility by putting acetic acid (vinegar) on the rock. If you get a reaction, avoid.

 

[AnDr3w]

Good tip ewurm.

 

[BIGgourami]

also no geode is aquarium safe i think

 

[kittyhazelton]

How about crystals like quartz/smokey quartz? I know there is alot of quartz naturally around here and I see it on rocks that are in alot of lakes and ponds with plenty of fish in them. Would it be ok to put in an aquarium? as long as I keep an eye on water parameters.

 

[plausible]

diamonds would look great in your tank jk!!