Antique 1800s Cobalt Blue Floral Design stoneware Pottery Crock. The item “Antique 1800s Cobalt Blue Unique Floral Design Stoneware Pottery Crock” is in sale since Saturday, June 20, 2020. This item is in the category “Pottery & Glass\Pottery & China\Art Pottery\Other American Pottery”. The seller is “bup_9016″ and is located in Marriottsville, Maryland. This item can be shipped to United States.