1. 🔎 UNIDENTIFIED Is this fossil in nature?

    Wondering what would cause this pitting.
  2. Fist size agate

    Found this doing spring cleaning at a place I bought so don't know for sure where it came from but would guess the Yellowstone river area. It's fist size with bright orange or red. Photo was taken wet to show the colors. Is it a blood agate? Any idea of worth? Thanks
  3. Help me figure out what this is

    My best guess is an agate forming around a bone The outside is hard but the white rock/substance that the rock seems to be forming over is soft