Q&A · identification
How do the origins of marble and quartzite differ?
Marble is a metamorphic rock that originates from limestone or dolomite, which undergoes intense heat and pressure to recrystallize its calcite minerals. Quartzite is also a metamorphic rock, but it originates from quartz-rich sandstone. The heat and pressure fuse the quartz grains together, creating an incredibly dense and hard material.