mineral

Quartz Pebble (Sea Glass-like texture)

Silicon Dioxide (SiO2)

Hardness: 7 on the Mohs scale; Color: Milky white to translucent; Luster: Vitreous to waxy (when river-worn); Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on the Mohs scale
Color: Milky white to translucent
Luster: Vitreous to waxy (when river-worn)

Identified March 21, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the cooling of silica-rich magma or precipitation from hydrothermal veins. This specific specimen has been chemically or mechanically weathered by water and sand, giving it a characteristic frosted appearance similar to sea glass.

Uses & applications

Common quartz is used in the manufacture of glass, ceramics, and abrasives. In this rounded form, it is often used for decorative landscaping, jewelry (as tumbled stones), and as a collector's item for those interested in lithotherapy or beachcombing.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Its 'frosted' look on beaches is caused by thousands of tiny impacts with sand and other rocks, which create microscopic fractures that scatter light.

Field identification & locations

Identify in the field by its hardness (it will scratch glass) and its lack of cleavage. It is commonly found on beaches, in riverbeds, and as inclusions in igneous rocks. Collectors often look for high translucency or unique inclusions.

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