<P> It is a group of complex silicate minerals and has similar chemical compositions . There are three groups of garnet - aluminum - garnet group, chromium - garnet group, and iron - garnet group . The minerals in aluminium - garnet group are almandine, grossularite, pyrope, and spessartine . The mineral in Iron - garnet group is andradite . The mineral in chromium - garnet group is uvarovite . Garnet group minerals occur in different rock types . It is a hard substance . It is resistant to chemical exposure . It is used as a semi-precious stone and also in abrasives, sand blasting, water filtration materials and water jet cutting . Garnets are available in Andhra Pradesh, Chhattisgarh, Jharkhand, Kerala, Orissa, Rajasthan and Tamil Nadu . It is also found in beach sands of Kerala, Orissa and Tamil Nadu states . In 2007 - 08, India produced 8, 73,000 tonnes . </P> <P> It is a meta - silicate of calcium . It is mostly white in color and occurs as bladed or needle like crystals . As of 2010, India had 16 million tonnes of resource . Most of the deposits are available in Rajasthan (Dungarpur, Pali, Sirohi and Udaipur districts). Minor amount of deposits are found in Gujarat and Tamil Nadu . It is mainly used in ceramic industries and metallurgical applications . It is also used as a filler in wall tiles, paint, rubber and plastic . India is one of the largest reserves . In 2010, India produced 1, 45,000 tons . It is mined by opencast method . It is also used as a substitute for short - fibre asbestos in brake - linings . Central Building Research Institute has found that wollastonite can be used as substitute for chrysotile asbestos in cement products . </P> <P> It is a group of metamorphic minerals - sillimanite, kyanite and andalusite . These are polymorphs of alumino - silicate . These are formed under high - pressure and high - temperature conditions . The three minerals are calcined to form mullite . Mainly used as refractory materials . As of 2010, India had 66 million tonnes of sillimanite, 100 million tonnes of Kyanite and 18 million tonnes of Andalusite as resource . Most of the resources are found in Tamil Nadu, Orissa, Uttar Pradesh, Andhra Pradesh, Kerala and Assam . Minor amount of resources are found in Jharkhand, Karnataka, Madhya Pradesh, Maharashtra, Meghalaya, Rajasthan and West Bengal . Granular sillimanite is available in beach sands of South India . Sillimanite refractory bricks are used in steel, glass and petrochemical industries . In 2004, India produced 14,500 tonnes of sillimanite and 6200 tonnes of kyanite . </P> <P> It is a compound of iron and titanium . It will be iron - black or steel - gray in color . It is a non-toxic material used in biomedical substances . Institute of Minerals and Materials Technology has developed an environmentally friendly technology for processing ilmenite . It is also used in production of titanium dioxide pigment . It is available in Kerala, Tamil Nadu and Orissa . Mining is done at Chavara, Chatrapur, Aluva and Manavalakurichi by Indian Rare Earths limited . As of 2013, India has 21% of the world's reserves and constitutes 6% of the world's production . </P>

Natural resources in india and telangana their distribution