unusual stone

  1. Unusual beach pebbles markings resembling a map found in Cyprus

    I found this stone in the southern shore of Cyprus. It has very unusual markings. I was wondering if anyone has seen they markings before and could maybe explain how they are formed.
  2. Help id this rock

    So my friend bought a box of random stones and theres like 20 of these all are pretty uniform in size shape and color broke one open has a rust color core that fades to a lighter tan toward the surface. And the knots completely cover the surface
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