mineral
White Quartz (Tumbled/Waterworn)
Silicon Dioxide (SiO2)
Hardness: 7 on Mohs scale. Color: White to milky white. Luster: Vitreous to greasy. Crystal system: Trigonal. Cleavage: None, exhibits conchoidal fracture. Specific gravity: 2.65.
- Hardness
- 7 on Mohs scale
- Color
- White to milky white
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 7 on Mohs scale. Color: White to milky white. Luster: Vitreous to greasy. Crystal system: Trigonal. Cleavage: None, exhibits conchoidal fracture. Specific gravity: 2.65.
Formation & geological history
Formed in various geological environments, predominantly in igneous rocks like granite and pegmatites, as well as hydrothermal veins. This specimen shows signs of mechanical weathering, such as being tumbled or waterworn into a smooth, rounded shape.
Uses & applications
Used in decorative items, lapidary arts, tumbled stone collections, and sometimes in glassmaking or electronics.
Geological facts
Quartz is one of the most abundant minerals in the Earth's continental crust. Its smooth, bean-like shape is typically the result of prolonged water action in a riverbed or ocean shore.
Field identification & locations
Easily identified by its high hardness (scratches glass), lack of cleavage, and smooth, rounded appearance from tumbling. Found globally in alluvial deposits, riverbeds, and beaches.
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