mineral

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Hardness: 7 (Mohs scale); Color: White to off-white/cream; Luster: Vitreous to waxy; Crystal Structure: Hexagonal/Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 (Mohs scale)
Color: White to off-white/cream
Luster: Vitreous to waxy

Identified March 11, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale); Color: White to off-white/cream; Luster: Vitreous to waxy; Crystal Structure: Hexagonal/Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Formed through the crystallization of silica-rich hydrothermal solutions in veins or as a primary constituent of igneous rocks. This specific specimen has been water-worn and rounded through fluvial (river) or marine (beach) erosion.

Uses & applications

Used in the production of glass, ceramics, and abrasives. In construction, it is used for road base and landscaping. Milky quartz can also be used as a gemstone for beads or metaphysical collecting.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. The 'milky' appearance is caused by tiny inclusions of gas or liquid trapped during the crystal's formation.

Field identification & locations

Identify in the field by its hardness (will scratch glass), lack of cleavage, and translucent white appearance. Commonly found in riverbeds, glacial deposits, and mountain outcrops globally.