mineral
White Quartz Pebble
Silicon Dioxide (SiO2)
Hardness: 7 on Mohs scale; Color: Milky white to translucent; Luster: Vitreous to waxy; Crystal structure: Hexagonal; Cleavage: Indistinct/Conchoidal fracture.
- Hardness
- 7 on Mohs scale
- Color
- Milky white to translucent
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 on Mohs scale; Color: Milky white to translucent; Luster: Vitreous to waxy; Crystal structure: Hexagonal; Cleavage: Indistinct/Conchoidal fracture.
Formation & geological history
Formed through the cooling of silica-rich magma or precipitation from hydrothermal veins. This specimen appears water-worn, indicating it was shaped by fluvial or coastal erosion.
Uses & applications
Common quartz is used for abrasive sandblasting, glass manufacturing, and as a component in concrete. Tumbled stones are popular in jewelry and metaphysical collections.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. The white 'milky' color is caused by tiny fluid inclusions of gas or liquid trapped during crystal growth.
Field identification & locations
Identify in the field by its ability to scratch glass and lack of reaction to acid. Common in riverbeds, beaches, and mountain outcroppings worldwide.
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