Minerals and Ores

Azurite Cu₃(CO₃)₂(OH)₂ and malachite Cu₂CO₃(OH)₂ are ores of copper.

India is the world's leading producer of mica, accounting for about 60% of global production. Mica is important for electrical and electronic industries. India also has significant production of coal and manganese but leads specifically in mica.

The term 'Black Gold' in economics and industry refers to coal, which has been called so due to its black color and immense economic value as an energy source. Coal powered the Industrial Revolution and remains a crucial energy resource. Petrol (petroleum) is called 'liquid gold' rather than black gold.

Sodium nitrate is the chemical compound with the formula NaNO₃.

Hematite (Fe₂O₃) is one of the most important iron ores, containing up to 70% iron by weight. It's a reddish-brown to black mineral that has been used as a source of iron since ancient times. The name comes from the Greek word for blood, referring to the red color of its powdered form. Zinc, silver, and aluminum have their own distinct ores like sphalerite, argentite, and bauxite respectively.

Steel production requires iron ore as the primary mineral, coal as both fuel and reducing agent, and manganese as a key alloying element that improves strength, hardness, and removes impurities like sulfur. While limestone is crucial in steelmaking as a flux to remove silica impurities, the question specifically asks for minerals used 'in' steel - meaning the final product composition, where manganese is an essential alloying mineral.

Magnesium, iron and silica are major elements of olivine. It is used in jewellery.

Mica is an alumino-silicate mineral group widely used in electrical insulation due to its excellent dielectric properties, heat resistance, and ability to be split into thin sheets. Bauxite is an aluminum ore, chromites are chromium ores used for metal production, and manganese is a metallic element.

Fe3O4 is the chemical formula for Magnetite, a magnetic iron oxide. Hematite is Fe2O3, and Stone/Clay are not specific iron oxides.

Monazite sand is the primary commercial source of thorium, containing thorium oxide along with rare earth elements. Ilmenite is a titanium ore, pitchblende (uraninite) is a uranium ore, and galena is a lead ore.

Monazite sand is the primary commercial source of thorium, containing thorium phosphate along with rare earth elements. Ilmenite is primarily titanium ore, pitchblende (uraninite) is uranium ore, and galena is lead sulfide (PbS). Monazite deposits are found in beach sands and certain rock formations.

The minerals deposits in Chhatisgarh are Bauxite (96 million ton), Dolomite (606 million ton) and Iron ore (2336 million ton). Tin is not found in Chhatisgarh.

Iron, copper, gold and silver are metallic minerals.