sedimentary
Quartz Pebble
Silicon dioxide (SiO2)
Hardness of 7 on the Mohs scale, typically white, gray, or clear in color, vitreous luster, hexagonal crystal system when crystal faces are present, no cleavage, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, typically white, gray, or clear in color, vitreous luster, hexagonal crystal system when crystal faces are present, no cleavage, specific gravity of 2.65.
Formation & geological history
Formed through the weathering and erosion of parent rocks containing quartz, followed by transportation by water or wind and deposition in sedimentary environments like rivers or beaches.
Uses & applications
Used in landscaping, construction aggregate, glassmaking, and as a common specimen for amateur rock collectors.
Geological facts
Quartz is one of the most abundant and durable minerals in Earth's continental crust, highly resistant to both chemical and physical weathering.
Field identification & locations
Found worldwide in riverbeds, beaches, and conglomeritic sedimentary rock formations. Identified by its high hardness (scratches glass) and conchoidal fracture.
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Quartz pebble
Silicon dioxide (SiO2)
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