Is Tigers Eye And Obsidian Safe For Aquariums?

[bristlenoseitplecoman]

I have finally gotten my 55 gallon tank and I am thinking about putting rocks in my aquarium. can anyone tell me if obsidian and tigers eye is safe and possibly give me a few more options

 

[ParadiseGuerrero]

there's actually a topic on what rocks are'arn't safe- http/www.fishforums.net/index.php?/topic/55806-rocks-for-use-in-the-aquarium/ It doesn't have all of them but it is very useful. I know Tiger Eye is safe but I have no clue with Obsidian.

 

[bristlenoseitplecoman]

I looked around on the internet and found out obsidian is safe. even though it contains magnesium and Iron its a volcanic glass so it doesn't leech into the water

 

[Devilish Angelfish]

I looked around on the internet and found out obsidian is safe. even though it contains magnesium and Iron its a volcanic glass so it doesn't leech into the water

Most non-porous stones are safe except Malachite which will slowly dissolve into the water - its poisonous to humans as well.