The Dharwar System is the oldest rock system in India, dating back to the Archean Eon (3.8 billion years ago).

India is one of the largest producers of iron ore in the world, with major deposits found in the states of Odisha, Jharkhand, and Chhattisgarh.

Jharkhand is the leading coal-producing state in India, accounting for over 25% of the country's total coal production.

Rajasthan is the leading copper-producing state in India, accounting for over 70% of the country's total copper production.

Karnataka is the leading gold-producing state in India, accounting for over 70% of the country's total gold production.

Madhya Pradesh is the leading diamond-producing state in India, accounting for over 90% of the country's total diamond production.

Odisha is the leading manganese-producing state in India, accounting for over 80% of the country's total manganese production.

Odisha is the leading bauxite-producing state in India, accounting for over 50% of the country's total bauxite production.

Rajasthan is the leading limestone-producing state in India, accounting for over 30% of the country's total limestone production.

Rajasthan is the leading sandstone-producing state in India, accounting for over 40% of the country's total sandstone production.

Karnataka is the leading granite-producing state in India, accounting for over 50% of the country's total granite production.

Rajasthan is the leading marble-producing state in India, accounting for over 90% of the country's total marble production.

Andhra Pradesh is the leading slate-producing state in India, accounting for over 60% of the country's total slate production.

Rajasthan is the leading gypsum-producing state in India, accounting for over 90% of the country's total gypsum production.

Gujarat is the leading salt-producing state in India, accounting for over 70% of the country's total salt production.