Explanation:

 Mining sector in Rajasthan is another pre-eminent sector next to Agriculture. There are about 42 major and 28 minor minerals found in the region. This sector provides employment to about two million mine workers throughout the state.

The huge sandy expanse of Rajasthan is rich in the white and bright Wollastonite (used primarily in ceramics, plastics and as a paint filler), lead, zinc, calcite (basically used as a construction material), gypsum, rock phosphate (to make organic manure), silver, marble, sandstone and serpentine (green marble), dolomite, emeralds and garnets.