Posted in 1000 Questions, Building Materials What are stonewares? Author: Civil Engineer Published Date: January 3, 2014 Leave a Comment on What are stonewares? Ques:What are stonewares? Answer:Stonewares are manufactured from refractory clay mixed with crushed pottery, powdered stone etc. by burning it at a very high temperature. these are hard and durable, imperious. Stoneware pipes are used in sewers.