"What Is It???" Wednesday: Day with Dot

I had read about this artifact in field reports but never held it in my hand before last month while paying a visit to Dot Moore at the New Smyrna Beach Museum of History.  Recognize it?

WHAT IS IT???

Hint 1: it's small (keys thrown in for scale)

Hint 2: it's heavy (scale thrown in for scale)

scale reads 20 g

Hint 3: found on prehistoric sites

Text and Images: Sarah Miller, FPAN staff