mineral

Milky Quartz Pebble

Silicon Dioxide (SiO2)

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

Hardness: 7 (Mohs scale)
Color: Opaque white to creamy
Luster: Vitreous to greasy

Identified June 1, 2026More mineral →

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Physical properties

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

Formation & geological history

Forms from cooling silica-rich hydrothermal fluids in veins or crystallizing from magma. This specimen is a water-worn pebble likely from a river or beach environment.

Uses & applications

Industrial source of silicon, decorative landscaping, source of glass and high-quality silica, and often used in crystal healing or as a mineral collection starter.

Geological facts

Milky quartz gets its white color from millions of tiny fluid and gas bubbles trapped during crystal growth. It is the most common variety of crystalline quartz found on Earth.

Field identification & locations

Identify by its ability to scratch glass and its lack of cleavage. Often found near granite outcrops or in alluvial deposits like riverbeds and shorelines.