This is a net sinker.

It is from Egypt but the exact location is unknown. People fished for food using nets made of spun grass, wool and flax. They attached net sinkers to the bottom of the nets to make them sink, and wooden floats to the top edges if needed. The Egyptians caught and ate mainly Nile perch, catfish and eels. The poor ate fish as they could not afford to eat meat. For the pharaoh, priests and those living in the Afterlife, fish was considered unclean and they were not allowed to eat it. This is a net sinker. It is made from limestone. We do not know how old this object is.