mineral

Quartz Pebble

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale. Color: Translucent white to milky grayish-green with minor inclusion fractures. Luster: Vitreous to greasy. Crystal System: Trigonal/Hexagonal. Cleavage: None (conchoidal fracture). Specific Gravity: 2.65.

Hardness: 7 on Mohs scale
Luster: Vitreous to greasy

Identified July 23, 2026More mineral →

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Physical properties

Formation & geological history

Formed from silica-rich hydrothermal fluids or within igneous and metamorphic environments. This rounded shape results from stream or beach erosion, which smoothed and water-worn the original angular quartz chunk over extended periods.

Uses & applications

Used primarily in lapidary work, jewelry, landscape decoration, and collected as common beach or river rock specimens.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Rounded, water-worn quartz pebbles are often found in riverbeds and coastal regions worldwide.

Field identification & locations

Can be identified in the field by its hardness (scratches glass readily), translucent to opaque milky white appearance, greasy-to-vitreous luster, and smooth water-worn surface. Found globally along riverbeds, beaches, and gravel deposits.