mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale; Color: Milky white to translucent; Luster: Vitreous to greasy; Crystal structure: Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65

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

Identified May 16, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Milky white to translucent; Luster: Vitreous to greasy; Crystal structure: Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65

Formation & geological history

Forms in hydrothermal veins or as a late-stage mineral in igneous pegmatites. The milky appearance is caused by tiny inclusions of gas or liquid trapped during crystal growth.

Uses & applications

Used in glass making, electronics (piezoelectric properties), abrasives, and as decorative gravel or landscaping stone. Commonly collected by beginners.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz can sometimes contain microscopic grains of gold in hydrothermal veins.

Field identification & locations

Identify by its hardness (scratches glass), lack of cleavage, and waxy to vitreous luster. Found globally in riverbeds, mountains, and near volcanic sites.