Indian Minerals Yearbook 2016 IBM
are reported from Andhra Pradesh, Bihar, Delhi, Haryana, Karnataka, Kerala, Madhya Pradesh, Rajasthan,Tamil Nadu, Uttar Pradesh, etc. The silica sand from Naini area in Allabad district, Uttar Pradesh is of a very high quality . Cryptocrystalline Varieties This group includes chalcedony, agate, jasper, onyx, flint and chert.