this post was submitted on 25 Jul 2026
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Cool Rocks

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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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Moss Agate (?) (lemmy.nz)
submitted 3 days ago by Wren@lemmy.today to c/cool_rocks@lemmy.today
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It's about the size of a walnut in the shell. I got it with a bag of random rocks and tumbled it through four stages for about a month. The fact that it didn't get very rounded off means it's quite hard. It's more green in real life with lots of neat transparent bits.

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[–] lemmy_at_em@lemmy.world 4 points 3 days ago (1 children)

That's a cool rock.

[–] Wren@lemmy.today 2 points 2 days ago

Thank you.

[–] Terrapinjoe@lemmy.world 3 points 3 days ago (1 children)

Doesn't look like an agate. Kind of looks like fossilized coral with quartz

[–] Wren@lemmy.today 2 points 2 days ago

Could be, I'm no expert. It's a lot more green that it appears in the picture, and closest matches I found were agates. Is fossilized coral very hard? It didn't wear down as fast as the quartz in the same batch.