- Gemstone and industrial diamond mining (1)
- Gem stones (natural) mining, nec (5)
- Pumice mining (2)
- Talc mining (1)
- Soapstone mining (2)
- Peat grinding (1)
- Asphalt mining and bituminous stone quarrying (1)
- Agate mining (1)
- Diatomaceous earth mining (1)
- Perlite mining (1)
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- Miscellaneous nonmetallic minerals, except fuels
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