History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c16.2

v1.c16.2

However, archaeological studies have clearly proved that ancient civilization of Mesopotamia, Egypt and India made various siliceous and glazed materials including faience (glazed siliceous ware), glazed pottery and glass. Earliest faience and glazed steatite from Mesopotamia is datable to 5th millennium B.C. Faience has powdered quartz core with an over glaze, which is a soda-lime-silica glass, and is isotropic in nature (Marshall 1931).