sedimentary
Quartz River Stone
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, typically white to greyish with banded inclusions, 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 to greyish with banded inclusions, vitreous to greasy luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.
Formation & geological history
Formed via hydrothermal processes or crystallization in igneous and metamorphic environments, subsequently weathered, transported, and rounded by water action in riverbeds or coastal environments over millions of years.
Uses & applications
Used in landscaping, decorative stone, tumbling, glassmaking, and abrasive products.
Geological facts
Quartz is one of the most abundant minerals in the Earth's continental crust and exhibits piezoelectric properties, meaning it can generate an electrical charge when mechanical stress is applied.
Field identification & locations
Easily identified by its high hardness (scratches glass), lack of cleavage, and smooth water-worn surface. Commonly found in riverbeds, beaches, and alluvial deposits worldwide.
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