Augers can be found in white, tan, orange, and gray hues on the beach or at the surf line. Check to be sure that there isn't an occupant. If so, toss back into the sea. I love them for wreath-making. They have a nice 3D look when glued and point outward. They're also nice gap-fillers when there's a space between two shells on a wreath and you can fill that tight space.

When I bring augers home from the beach, I boil them atop the stove to rid any sea odor.Then I soak them in a little bleach and water mixture. I only do this step for shells with orifices just to be sure to get any residue out.