mineral
Quartz (Pebble)
Silicon Dioxide (SiO2)
Hardness of 7 on Mohs scale, translucent pinkish-tan to light brown color, vitreous to waxy luster, conchoidal fracture, trigonal crystal system, specific gravity approx. 2.65.
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Physical properties
Hardness of 7 on Mohs scale, translucent pinkish-tan to light brown color, vitreous to waxy luster, conchoidal fracture, trigonal crystal system, specific gravity approx. 2.65.
Formation & geological history
Formed in igneous, metamorphic, or sedimentary environments. This specimen is a stream- or beach-rounded pebble that has undergone natural erosion and transport.
Uses & applications
Commonly collected as river rocks, used in decorative landscaping, lapidary arts, or basic education in geology.
Geological facts
Quartz is one of the most abundant minerals in the Earth's crust. Water erosion naturally smooths sharp edges into rounded pebbles like this specimen.
Field identification & locations
Identified by its ability to scratch glass (hardness 7), lack of cleavage, and translucent nature. Found worldwide in riverbeds, gravel pits, and beaches.
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