Tussar silk (alternatively spelled as tussah, tushar, tassar, tussore, tasar, tussur, tusser and also known as kosa silk) saree is produced from silk obtained from larvae of several species of silkworms. It is valued for its rich texture and natural deep gold colour, and varieties are produced in many countries, including China, India, Japan, and Sri Lanka.
India is the second largest producer of tussar silk and the exclusive producer of Indian tussar (also known as tropical tussar), which is largely tended to by tribals. Much of it is produced in Bhagalpur (where it is called Bhagalpur silk), Bihar and Malda district of West Bengal. Tussar silk is also used for Orissa’s pattachitras and West Bengal’s kantha stitches. Chhattisgarh and Madhya Pradesh also produce tussar silk. In recent years, the state of Jharkhand has emerged as the biggest producer of tussar silk.