Muga silk is one of the rarest silks in the world and it is only produced in Assam. What sets this Silk apart from all others is that it is totally golden yellow in color. The word `Muga’ means yellowish in Assamese. The source of it is the Muga Silk worm which goes back to the age of the dinosaurs and is so sensitive in nature that it cannot tolerate even the most minimum of pollution levels. The Muga Silkworm is the larva of the Assam Silkmoth (Antheraea assamensis). Since Muga silk is one of the rarest silks, it is the most expensive type of silk.