For instance, flowers, birds, butterflies, animal figures, dragonflies, and organic designs are commonly added to the crock in a blue glaze that originated in central Pennsylvania.
The cobalt blue colored glaze found on some stoneware crocks is sometimes referred to as Dauphin glaze for its origin in Dauphin County, PA near the state capital of Harrisburg, PA.
New York, New Jersey, and Pennsylvania were the source for most stoneware of the early 1800s.
New England and Ohio followed suit in the latter decades of the 1800s. By definition, stoneware is a type of clay with a waterproof rating of less than 2%. Colors, density, and texture of stoneware vary greatly.
England and Germany were the main sources for stoneware in America until market competition and cost prompted American potters to produce stoneware at home.
By contrast, a highly detailed cobalt image found on a stoneware crock can raise the value, depending on maker, of such a collectible well into the ,000 to ,000 range.