It is impossible to pinpoint the exact origin of this piece but here is a short blurb i found. People have lived in the land of Oregon for thousands of years.When the Europeans first arrived in the land, there were numerous Native American tribes. Some of the major tribes included the Nez Perce, the Chinook , the Klamath, the Paiute, the Molalla, and the Cayuse. NATIVE AMERICAN INDIAN ACORN MORTAR & PESTLE PACIFIC NORTHWEST TRIBE" is in sale since Tuesday, October 26, 2021. This item is in the category "Collectibles\Cultures & Ethnicities\Native American\ US\Pre-1600\Artifacts". The seller is "bryjac13" and is located in Springfield, Oregon. This item can be shipped worldwide.