The Polka Dot beds are a fee-dig site owned by West Coast Mining that is usually open in the summer, from Memorial Day to Labor Day. You can dig your own material or purchase pre-dug agates by the pound. At the mine, we met Dale Hewitt, the owner of West Coast Gems and proprietor of the Polka Dot agate mine. The mine is on a hill above a picturesque canyon—a really beautiful location for one of the more unusual and interesting agates from the area.