mineral

Milky Quartz

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale; Color: Opaque white; Luster: Vitreous to greasy; Crystal Structure: Hexagonal; Cleavage: None/Conchoidal fracture; Specific gravity: 2.65

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

Identified July 10, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Opaque white; Luster: Vitreous to greasy; Crystal Structure: Hexagonal; Cleavage: None/Conchoidal fracture; Specific gravity: 2.65

Formation & geological history

Formed through the crystallization of magma or hydrothermal deposition in veins. The milky appearance is caused by tiny inclusions of gas or liquid trapped during crystal growth.

Uses & applications

Used in decorative landscaping, glassmaking, electronics (piezoelectric properties), and as a collector's specimen or for spiritual purposes.

Geological facts

Milky quartz is the most common variety of crystalline quartz. Historically, it was used by many cultures to create tools when flint was unavailable due to its hardness and sharp fracture edges.

Field identification & locations

Identify by its ability to scratch glass and lack of cleavage. It is extremely common in gravel pits, riverbeds, and as a component of many igneous and metamorphic rocks globally.