Circa 1000 B.C. - 800 A.D. Stone, 615 grams; 116 mm. A rare grinding stone used in the food preparation process, and for smoothing animal hides. It was made from 'Sand Stone' in the North American Woodland period. This antiquity was collected from extensive farmland in Sweetwater County, Wyoming, USA, over a period of about three decades. This area later became the homelands of the Shoshone and Arapaho tribes. From the old Sweetwater collection. Very Fine condition. Supplied with certificate of authenticity.