mineral
Clear quartz pebble
Quartz (silicon dioxide, SiO₂)
AI-generated identification · may be incorrectLikely tumbled quartz: colorless to smoky-clear, vitreous luster, translucent, with irregular fractures and no obvious cleavage. Mohs hardness 7; trigonal crystal structure; specific gravity about 2.65.
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Physical properties
Likely tumbled quartz: colorless to smoky-clear, vitreous luster, translucent, with irregular fractures and no obvious cleavage. Mohs hardness 7; trigonal crystal structure; specific gravity about 2.65.
Formation & geological history
Quartz crystallizes from silica-rich igneous, hydrothermal, and metamorphic fluids; this specimen was likely mechanically tumbled and polished. Quartz ranges from Precambrian to modern geological settings.
Uses & applications
Common quartz is inexpensive and used in glass, ceramics, electronics, abrasives, and engineered stone; clear pieces are sold as decorative or metaphysical specimens.
Geological facts
Quartz is one of Earth’s most abundant minerals and displays piezoelectricity, producing an electrical charge under pressure.
Field identification & locations
Identify by its glassy luster, hardness, lack of cleavage, and ability to scratch ordinary glass; it should not fizz in dilute acid. Common worldwide, especially in granite, veins, quartzite, and alluvial gravels.
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