mineral

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Hardness: 7 (Mohs scale), Color: White or milky white, Luster: Vitreous (glassy) to greasy, Crystal structure: Hexagonal (trigonal), Cleavage: None (conchoidal fracture)

Identified June 1, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale), Color: White or milky white, Luster: Vitreous (glassy) to greasy, Crystal structure: Hexagonal (trigonal), Cleavage: None (conchoidal fracture)

Formation & geological history

Formed from the crystallization of silica-rich magma or hydrothermal veins. This specimen shows signs of water-worn erosion, likely from a fluvial (river) or coastal environment.

Uses & applications

Raw materials for glassmaking, abrasive in sandblasting, decorative landscaping, and occasionally used in costume jewelry or as a healing stone in metaphysical practices.

Geological facts

Milky quartz gets its characteristic white color from tiny bubbles of gas or liquid trapped during the crystal's growth. It is one of the most common minerals found in the Earth's crust.

Field identification & locations

Identify by its hardness (will scratch glass), white color, and lack of cleavage. It is found globally in riverbeds, beaches, and mountainous regions.