mineral

Milky Quartz Pebble

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 Mohs; Color: Opaque white to translucent; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 Mohs
Color: Opaque white to translucent
Luster: Vitreous to waxy

Identified July 14, 2026More mineral →

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Physical properties

Hardness: 7 Mohs; Color: Opaque white to translucent; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Formed from hydrothermal veins or as a primary constituent of igneous rocks like granite. This specific specimen has been water-worn into a smooth river pebble shape over thousands of years.

Uses & applications

Used in construction aggregates, glass making, electronics, and as decorative landscape stone or river rock for decorative purposes.

Geological facts

Milky quartz gets its white color from tiny fluid or gas inclusions trapped during crystal growth. It is one of the most common mineral varieties on the Earth's crust.

Field identification & locations

Identify in the field by its hardness (will scratch glass), white color, and lack of cleavage. Commonly found in riverbeds, beaches, and mountain trails worldwide.