Plainsman A3 Native Stoneware fired test bars

These are fired to cone 6, 8, 9 and 10 (top to bottom).

Materials	A3 Stoneware Clay A buff burning, high temperature somewhat sandy stoneware having ready-to-use plasticity.
Glossary	Native Clay A clay that a potter finds, tests and learns to process and use himself. To reduce the costs of importing materials manufacturers, especially in Asia, often develop processes for clays mined in their locality.