mineral
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, transparent to translucent with a vitreous luster, white to off-white or yellowish color, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, transparent to translucent with a vitreous luster, white to off-white or yellowish color, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.
Formation & geological history
Formed through crystallization in igneous, metamorphic, and sedimentary environments. Over long periods of weathering and erosion, durable quartz grains and pebbles are left behind in riverbeds, beaches, and alluvial deposits.
Uses & applications
Commonly collected as a mineral specimen, used in lapidary work, landscaping, and sometimes in aggregate production.
Geological facts
Quartz is one of the most abundant and durable minerals in the Earth's continental crust, making up a large percentage of beach sand.
Field identification & locations
Can be identified by its high hardness (scratches glass), lack of cleavage, and typical conchoidal fracture. Found worldwide in nearly all geological environments.
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