This is a superbly crafted, 8.25 lb. basalt metate, and 10 oz. mano: both artifacts are

pecked, ground, and super smoothed, prehistoric Paleo-American, rock art hand tools. There are various  concave, and convex areas  incorporated into the design and placed around the entire sculpture adding comfort, and grip strength. Also, these implements have a knapping, hammer, pecking, grinding/smoothing, applicability based on its structure and hand position and wear/stress areas. The metate works well on the lap, held, or on the ground. (There are several  conspicuous images too.) The 10 oz. mano is made of limestone. Both implements have been meticulously sculpted, and present a wonderful example of ancient ingenuity, design, and problem solving! Both mano and metate are exceptional examples of ancient craftsmanship; truly an awesome addition to a collector's assemblage. Found "as is" in Clackamas County, Oregon near the Columbia River Gorge. Thank you for viewing this treasure from the ancient inhabitants of North America.