I was planting some flowers and hit a weird looking rock with my shovel. It has these spiral patterns that make me think it's an ammonite fossil. What's a safe way to get the dirt off without hurting it?
My dad tried cleaning a fossil once with a wire brush. He thought it was just a weird rock in the concrete of our old patio. Took off half the detail before he realized it was actually something. We just have a smooth stone patch now.