Abstract: The placer mineral deposits along the east coast of India are known for the economic concentration of ilmenite, garnet, sillimanite, zircon, monazite, etc. Out of thismineral the ilmenite is most abundant followed by garnet and sillimanite.

 — India: India is one of the leading producers of sillimanite. The state of Odisha, particularly the Ganjam and Koraput districts, is known for its extensive sillimanite deposits. Other regions in India with notable occurrences include Tamil Nadu, Andhra Pradesh, Rajasthan, and Jharkhand.

The beach and dune sands in India contain heavy minerals like ilmenite, rutile, garnet, zircon, monazite and sillimanite. A combination of favorable factors like network of drainage, aided by wind and coastal processes like waves and currents, have influenced the formation of the. beach and adjoining dune sands.

 — Sillimanite is a common metamorphic mineral, typical for high grade and aluminum rich metamorphic rocks. Its often present in para-gneiss and some hornfels, also in certain silica rich contact metamorphic rocks. Sillimanite rarely …

Fire-clay. It is known that fire-clays occur with coal measures of the Makum coalfield and that the Assam Railways and Trading Company prepared fire-bricks and refractories from these clays for their own requirements. Similar clay may be found in the Karbi Anglong Hills where the lower Eocene (Cherra State) coal, seam, etc., occur.

Sillimanite The production of sillimanite at 69,033 tonnes in 2018-19 decreased by 15% as compared to that in the previous year. There were 6 reporting mines in 2018-19. Besides, four mines reported production of sillimanite as an associated mineral with garnet and kyanite during the year. Ninety-nine per cent of total production

Massive sillimanite is at present being mined in Bhandara district, Maharashtra. Granular variety is recovered as by-product of mining of beach sands from Kerala, Tamil Nadu and Odisha.

 — INTRODUCTION. Raw materials with a high alumina content are commercially important to the production of refractories. With a medium high percentage of alumina (roughly 60-70%), the sillimanite group of minerals have been a staple of the refractory raw materials industry for many years.

 — Sillimanite mineral concentrates with 98.7% grade and 27.2% yield, and 84.6% recovery. The process flow sheets drawn for achieving all the individual minerals are economically viable and ready to set up a commercial mineral separation plant.

The value of mineral production in India covering fuel, metallic, non-metallic and minor minerals rose spectacularly during the last 8 decades since 1950 and touched the level of Rs. 1,65,326 crores in 2019-20 and the level of Rs 1,58,869 crores in 2020-21 respectively (Table-12). The increase in the value was