Vintage Stan Langtwait Cedar Leaf. Mt St Helen’s Shapes of Clay Art Pottery Bowl. An original vintage Stan Langtwait art pottery bowl. Made from the ash of Mount Saint Helens. Round in shape with a cedar leaf design in center. Natural earthen tone with some deep carvings, a few. Of them bear Stan’s fingerprints (as seen in PICs). A logger who founded Shapes of Clay in. Graham, Washington back in the 1950′s, died. Weighs 1 pound 4.9 ounces. Approximate 7″ in diameter, 1 and 1/2″ in height. Please magnify and view all photos.