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Quartzite
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==Safety== As quartzite is a form of silica, it is a possible cause for concern in various workplaces. Cutting, grinding, chipping, sanding, drilling, and polishing natural and manufactured stone products can release hazardous levels of very small, crystalline silica dust particles into the air that workers breathe.<ref>{{cite book |title=Hazard Alert - Worker Exposure to Silica during Countertop Manufacturing, Finishing and Installation |publisher=DHHS (NIOSH) |page=2 |url=https://www.osha.gov/Publications/OSHA3768.pdf |access-date=27 November 2019}}</ref> Crystalline silica of respirable size is a recognized human [[carcinogen]] and may lead to other diseases of the lungs such as [[silicosis]] and [[pulmonary fibrosis]].<ref>{{cite web |title=Silica (crystalline, respirable) |url=https://oehha.ca.gov/chemicals/silica-crystalline-respirable |website=OEHHA |publisher=California Office of Environmental Health Hazard Assessment |access-date=27 November 2019}}</ref><ref>{{cite book |title=Arsenic, Metals, Fibres and Dusts. A Review of Human Carcinogens |date=2012 |publisher=International Agency for Research on Cancer |isbn=978-92-832-1320-8 |pages=355β397 |edition=100C |url=https://www.ncbi.nlm.nih.gov/books/NBK304375/pdf/Bookshelf_NBK304375.pdf |access-date=27 November 2019}}</ref>
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