mineral

Milky Quartz (river pebble)

Quartz (Silicon Dioxide, SiO2)

Hardness: 7 on the Mohs scale; Color: Opaque white to translucent with iron staining (pinkish/orange); Luster: Vitreous to greasy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65.

Hardness: 7 on the Mohs scale
Luster: Vitreous to greasy

Identified March 7, 2026More mineral →

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Physical properties

Formation & geological history

Formed from silica-rich hydrothermal fluids in veins or as a major constituent of igneous rocks. This specific specimen has been polished smooth by water transport in a river or marine environment. Geological age ranges from Precambrian to Cenozoic.

Uses & applications

Used industrially in glass making, ceramics, and as an abrasive. Polished river stones are used in landscaping, home decor, and occasionally as 'healing stones' in metaphysical practices.

Geological facts

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

Field identification & locations

Identify by its hardness (will scratch glass easily) and lacks of cleavage. Usually found in stream beds, beaches, and eroded mountain trails worldwide. Collectors look for unique shapes or clarity.

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