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submitted 2 weeks ago by Wren@lemmy.today to c/cool_rocks@lemmy.today
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[-] ButteryMonkey@piefed.social 2 points 2 weeks ago* (last edited 2 weeks ago)

The foundation of my house is made of boulders, do those count?

I have several dozen free of metal contamination that are in my turtle tank and aquariums. I found them on hikes, at beaches, and from lots of different regions.

I also have a bunch that have metal contamination (slag or natural deposits) which are in a jar because they kill invertebrates so can’t have them in the tanks.

Other than that I have lava rock on top of most of my plants.

this post was submitted on 23 Jan 2026
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Cool Rocks

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A place for:

Minerals are cool, too.

Be gneiss to each other

Please use posts for your rocks. Feel free to add more pictures and links to articles in the post text.

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