unknown rock

  1. unknown rock

    any ideas on what this rock is? the other pic is a small piece i broke off. breaks like obsidian or flint, but the color and holes threw me. thanks
  2. Pls help identify these rocks

    Hello! I was out on a hike yesterday to take pictures of plants and fungi, when on my way back to civilization I found peculiar shaped rocks in a barren field near the woods. The first one I spotted looked like a dried plum (yet like a stone) but I didn't want to touch it just in case it...
  3. INTERESTING FLOATING ROCK (NOT PUMICE).. HELP PLEASE! THX! :)

    HI to everyone!:hello: I've found this rock in KAREKARE beach near Auckland (West coast of North island- New Zealand). Light grey color with several dark crystals included , very fractured (like clay), quite hard consistency, scratching with a metal key it shows very shallow marks...and it...
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