*FORMULA CHANGE ON THE FOLLOWING CLAYS*
*181, 417, 420, 563, 630*
Similar in texture to a worn stone found at the bottom of a river, Blue Stone carries a softness that is visible in its smooth blue-green matte color. The different shades of green feather into dark blues when applied over texture wares.
Tableware producers must test all finished ware to establish dinnerware status, due to possible variations in firing temperature and contamination.