Coimbatore has emerged as the natural hub of wet grinder industry due to the availability of the natural stones suitable for the wet grinders nearby. The product was invented in Coimbatore and developed into various models by the entrepreneurs of Coimbatore. The uniqueness of the wet grinders is the particular stone used for manufacturing got reputation in the market. These stones are available from the hills located in Coimbatore and Erode districts. These stones are semi-granite in nature with small quantity of Silica and Mica. This cluster is not available anywhere else in the world and the same is available at a few feet below the surface level in and around Coimbatore and Erode districts.