mineral

Milky Quartz

Silicon dioxide (SiO2)

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

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

Identified April 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 opaque white; Luster: Vitreous to greasy; Crystal structure: Hexagonal/Trigonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65

Formation & geological history

Formed through the crystallization of magma or from hydrothermal veins. The milky color is caused by microscopic fluid inclusions of gas and/or liquid trapped during crystal growth. They can be found in rocks from all geological eras.

Uses & applications

Used in the glass and ceramic industries, as an abrasive, in landscaping/decoration, and occasionally for healing crystals or low-cost jewelry.

Geological facts

Milky quartz is one of the most common minerals on Earth's crust. It is often referred to as 'Snow Quartz' in the gem market. Historical artifacts like arrowheads were sometimes carved from this material because of its hardness and predictability when fracturing.

Field identification & locations

Identify in the field by its hardness (will scratch glass and steel), white color, and lack of cleavage. It is commonly found in riverbeds, mountains, and as garden gravel worldwide.