metamorphic
Pink quartzite pebble
Quartzite; predominantly microcrystalline quartz (SiO₂), possibly iron-oxide tinted
AI-generated identification · may be incorrectHardness about 7 Mohs; pale pink, fine-grained, matte to subtly waxy surface from weathering or tumbling; massive, nonfoliated texture with no visible cleavage and conchoidal fracture. The rounded shape indicates natural abrasion or polishing.
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Physical properties
Hardness about 7 Mohs; pale pink, fine-grained, matte to subtly waxy surface from weathering or tumbling; massive, nonfoliated texture with no visible cleavage and conchoidal fracture. The rounded shape indicates natural abrasion or polishing.
Formation & geological history
Formed when quartz-rich sandstone recrystallized under heat and pressure, commonly during mountain-building; age depends on its parent formation and cannot be determined visually. The pebble was likely rounded in a stream, beach, or tumbling process.
Uses & applications
Used as durable aggregate, paving and landscaping stone, decorative objects, and occasionally cabochons or collectible polished pebbles.
Geological facts
Quartzite is generally more resistant to weathering than its original sandstone and can preserve faint former bedding or cross-bedding. The pink color commonly reflects trace iron oxides or feldspar impurities.
Field identification & locations
Identify it by its extreme hardness, quartz-like sparkle on a fresh scratch, lack of visible sand grains, and inability to scratch it with a steel knife; it should scratch glass. Common sources include metamorphic mountain belts worldwide.
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