mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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

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

Identified June 15, 2026More mineral →

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; Cleavage: None (conchoidal fracture); Specific gravity: 2.65

Formation & geological history

Formed in hydrothermal veins or pegmatites; the white color is caused by microscopic fluid inclusions of gas or liquid trapped during crystal growth. Can form in almost any geological age.

Uses & applications

Used in glass making, ceramics, as a source of silicon for electronics, and commonly used in landscaping or as a decorative 'lucky' stone.

Geological facts

Milky Quartz is the most common variety of crystalline quartz. While it lacks the transparency of rock crystal, it is prized for its snowy appearance and durability.

Field identification & locations

Identify by its hardness (it will scratch glass), lack of cleavage, and white 'milky' appearance. Found globally, often sticking out of soil or in stream beds due to its resistance to weathering.