For calculating the value of output, the mining and quarrying sector is divided into two broad groups viz., Major Minerals and Minor Minerals.
- Minor minerals are those, which are declared by the Central Government under Section I (a) of the Mines & Minerals (Regulation & Development) Act, 1957. They are further revised and notified from time to time in the Gazette of India.
- The major minerals cover fuel minerals consisting of coal, lignite, petroleum and natural gas and other major minerals i.e. metallic minerals including atomic minerals and non-metallic minerals