Mining and quarrying, contract drilling and related support activities

• 212 - Mining and quarrying (except oil and gas)
• 2123 - Non-metallic mineral mining and quarrying

21232 - Sand, gravel, clay, and ceramic and refractory minerals mining and quarrying

This industry comprises establishments primarily engaged in operating sand and gravel pits, including dredging for sand and gravel; mining or quarrying shale; and mining, beneficiating or otherwise preparing kaolin or ball clay, including china clay, paper and slip clays, and other clays and refractory minerals.