sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, typically white or translucent, vitreous to greasy luster, 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, typically white or translucent, vitreous to greasy luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.
Formation & geological history
Formed through the weathering and erosion of quartz-bearing rocks (such as granite or pegmatite), followed by prolonged water transport in rivers or beaches that rounds the edges.
Uses & applications
Used in landscaping, decorative accents, abrasive manufacturing, glassmaking, and rock collecting.
Geological facts
Quartz is one of the most abundant and durable minerals in Earth's continental crust, surviving weathering processes that destroy other minerals.
Field identification & locations
Found worldwide in riverbeds, beaches, and alluvial deposits. Easily identifiable by its high hardness (scratches glass) and lack of cleavage.
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