metamorphic
Quartzite Pebble
Metamorphic Quartzite
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, vitreous luster, conchoidal fracture, and compact interlocking quartz crystals.
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Physical properties
Hardness of 7 on the Mohs scale, vitreous luster, conchoidal fracture, and compact interlocking quartz crystals.
Formation & geological history
Formed when quartz-rich sandstone is subjected to heat and pressure, typically during tectonic mountain-building events.
Uses & applications
Used in construction, road surfacing, decorative landscaping, and occasionally as a tumbling or carving stone.
Geological facts
Quartzite is extremely durable and resistant to chemical weathering, often outlasting the surrounding parent rock.
Field identification & locations
Identify by its hardness (scratches glass), non-reactive nature to acid, and sugary textured fractured surfaces; found globally in ancient orogenic belts.
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