metamorphic
Quartzite Pebbler
Quartzite (mainly SiO2)
Hardness: 7 (Mohs scale), Color: Pinkish-tan/orange, Luster: Vitreous to dull (weathered), Crystal structure: Trigonal (microcrystalline), Cleavage: None, Specific Gravity: 2.6-2.7
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Physical properties
Hardness: 7 (Mohs scale), Color: Pinkish-tan/orange, Luster: Vitreous to dull (weathered), Crystal structure: Trigonal (microcrystalline), Cleavage: None, Specific Gravity: 2.6-2.7
Formation & geological history
Formed from the recrystallization of quartz sandstone through heat and pressure (metamorphism), then rounded by fluvial or marine erosion.
Uses & applications
Commonly used in landscaping, as decorative gravel, in construction as crushed stone, and occasionally in jewelry as tumbled stones.
Geological facts
Quartzite is so tough that it often outlasts the surrounding rock layers during erosion, frequently being found as weather-resistant pebbles in riverbeds.
Field identification & locations
Identify by its ability to scratch glass and its grainy, 'sugary' texture under a lens. Common in ancient shields and river systems worldwide.
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