mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Hardness: 7 on Mohs scale
Color: White to creamy/cloudy
Luster: Vitreous to greasy

Identified June 17, 2026More mineral →

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Physical properties

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

Formation & geological history

Forms from the cooling of hydrothermal veins or during the crystallization of igneous rocks such as pegmatites. It is the most common variety of crystalline quartz found globally.

Uses & applications

Used primarily in industrial glass making, as an abrasive, in electronics for its piezoelectric properties, and as a low-cost gemstone or landscaping material.

Geological facts

The milky white color is caused by tiny inclusions of gas or liquid trapped during crystal growth. It is found in almost every geological environment and is a major component of granite.

Field identification & locations

Identify in the field by its hardness (will scratch glass), white color, and lack of cleavage. Common in mineral veins and as pebbles in riverbeds. Look for the 'waxy' appearance.