"The index of mineral production of mining and quarrying sector for May (new series 2011-12=100) 2017, at 100.5, was 0.9 per cent lower compared to the level in May 2016," the mines ministry said in a statement.
The total value of mineral production -- excluding atomic and minor minerals -- in the country during May 2017 was Rs 19,944 crore, it added.
The contribution of coal was the highest (36 per cent) at Rs 7,171 crore followed by petroleum (crude) Rs 5,634 crore, iron ore Rs 2,551 crore, natural gas (utilised) Rs 2,235 crore, limestone Rs 602 crore and lignite Rs 470 crore.