History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c13.s2.t4.183

v1.c13.s2.t4.183

The main minerals of zinc in nature are Calamine (ZnCO₃) and Sphalerite (ZnS), and mostly these occur in combination with the minerals of copper, lead, silver and iron. The mixed Zn, Pb, Ag and Fe sulphide deposit of Zawar in the Aravali hills near Udaipur has been known to be extensively worked in 11th century A.D., and zinc metal was being extracted by a novel technique of down draft reduction-distillation process which has led to the development of the modern industrial process adopted all over the World.