mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

AI-generated identification · may be incorrect

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

Hardness: 7 on Mohs scale
Color: White to translucent
Luster: Vitreous to greasy

Identified May 29, 2026More mineral →

Explore Milky Quartz in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

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

Formation & geological history

Formed in hydrothermal veins, pegmatites, and as a primary constituent in igneous rocks. The cloudy appearance is caused by tiny fluid inclusions of gas or liquid trapped during crystal growth.

Uses & applications

Used in glassmaking, as an abrasive, and in the production of silicon wafers for electronics. Also popular for landscaping, decorative carvings, and as a beginner collector's specimen.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky Quartz often occurs alongside gold in hydrothermal veins, making it an important indicator for prospectors.

Field identification & locations

Identified in the field by its hardness (will scratch glass), lack of cleavage, and white cloudy appearance. It is ubiquitous globally, particularly in mountainous regions and riverbeds.