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Quartzite or Quartz and Marble

Quartzite is a metamorphic rock, while quartz is an igneous rock that crystallizes from magma or precipitates around hydrothermal vents. Sandstone under pressure becomes quartz arenite and quartzite, but quartzite does not become quartz. The construction industry further complicates the matter. If you buy “quartz” for countertops, it is actually an engineered material made from […]