mineral

Milky Quartz

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Cloudy white to grayish; Luster: Vitreous to greasy; Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Cloudy white to grayish
Luster: Vitreous to greasy

Identified July 3, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Cloudy white to grayish; Luster: Vitreous to greasy; Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Formed from silica-rich hydrothermal solutions or as a primary constituent in igneous rocks like pegmatites. The milky appearance is caused by tiny inclusions of gas or liquid 'bubbles' trapped during crystallization.

Uses & applications

Used in electronics for its piezoelectric properties (if high quality), glassmaking, abrasives, and as a landscaping or decorative stone. Metaphysical collectors use it for meditative purposes.

Geological facts

Quartz is the most abundant mineral in Earth's continental crust. Milky quartz is the most common variety of quartz. It can sometimes contain minute traces of gold in quartz veins.

Field identification & locations

Identify by its hardness (will scratch glass), lack of cleavage, and translucent 'milky' appearance. It is found globally in mountainous regions and riverbeds.