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Enamel Rocks Resulting from Culturally Heating of Quartzite (2021)
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This is an abstract from the "SAA 2021: General Sessions" session, at the 86th annual meeting of the Society for American Archaeology. Quartzite is a commonly identified material used in the past as heating stones. The quartz minerals in quartzite stones are stable to around 500 degrees Celsius, at which point the quartz mineral experiences a chemical transition or inversion. A second inversion occurs at around 1500 degrees Celsius, causing the morphology to appear similar to tooth enamel....