What are stonewares? Civil Engineer 11 years ago 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. Share this: Concrete product among top 10 building materials for 2013What is cement?What is mortar?