Paleoindian period, about 12,000 to 10,000 years ago; Sudbury, Massachusetts; Material: Munsungan red chert; Length: 2.4 cm; Adams Tolman Collection, gift of Mrs. Adams Tolman (1990). Photograph by Jeff Boudreau.

A graver is a tool used for scoring bone and other materials. This one is made of Munsungan chert from Maine. Use of this material dates it to the Paleoindian period. Paleoindian artifacts are rare and have only recently been identified from the Subury site at which this graver was found due to research done on the Concord Museum collections by archaeologist Shirley Blancke.