this post was submitted on 14 May 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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Some cool rocks from a bag of rocks (lemmy.today)
submitted 4 days ago by Wren@lemmy.today to c/cool_rocks@lemmy.today
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A friend gifted me a bag of rocks, these are some of my favorites. I'll tumble them after my current batch is done in a couple weeks.

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[–] Wren@lemmy.today 2 points 3 days ago

In looking up how to tell, I found this site helpful for someone with only a basic understanding of rocks and minerals.

https://www.geologyin.com/2014/03/cleavage-of-minerals.html

The lines look more straightish than diamondish to me, especially in that lower right one which is kinda rhomboid, so I think calcite. Good tip!