Hello, this item is a naturally worn stone rather than a carved Native American artifact. The rounded form and the central depression are consistent with water erosion and natural abrasion, where softer areas of the stone wear down over time to create a concave cavity. The surface shows smooth weathering and irregular coloration typical of river or stream stones, and there are no visible tool marks, incised lines, or shaping that would indicate intentional carving or cultural modification.

Objects like this are often mistaken for effigy stones or symbolic carvings because natural erosion can produce forms that resemble eyes, faces, or animal heads. However, authentic Native American stone carvings usually show clear evidence of human workmanship, such as pecking, grinding, or symmetrical shaping. In the current market, naturally formed stones without verifiable cultural workmanship have no significant collectible value beyond curiosity or decorative use. The typical market value is nominal, generally under $20 USD.