District Kutch of the Gujarat State (India) is famous for good quality clay minerals like Bentonite China clay, Bauxite etc. Low Quality coal Lignite is also found in the area. The District Kutch, an independent terrain of land, having muddy desert on North-East called Rann of Kutch and Arabian Sea on South-West and is the second largest district of the country situated at extreme west end.

Both quality of Bentonite, swelling and non-swelling grade, are found in the nearly entire district has deposits of various quality of Bentonite but extensive mining of good quality Bentonite is carried out in Mandvi Taluka. More specifically, village Vandh, Serdi and Hamala are famous for swelling quality and village, Pundi, Goniasar and Asambia are famous for Non-swelling grade.

Due to porous crystal structure, Bentonite, pusses’ excellent property of absorption. It absorbs not only water but gases also. It expands several times of its weight volumetrically. It has very high viscosity and forms gel with water. All this properties are of sodium of swelling grade of Bentonite. The non swelling grade requires some chemical treatments to acquire property of absorption and is used in the manufacturer of bleaching earth.