mineral

Milky Quartz

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

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

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

Identified July 14, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed through the crystallization of silica-rich hydrothermal fluids in veins or as a primary mineral in igneous rocks like granite. Its cloudy appearance is caused by tiny inclusions of gas or liquid trapped during crystal growth.

Uses & applications

Used as a gemstone, in glassmaking, as an abrasive, in electronics (piezoelectric properties), and as decorative landscaping stone.

Geological facts

Milky quartz is the most common variety of crystalline quartz. It is often found in large veins that can be several meters thick and can contain gold or other precious metals.

Field identification & locations

Identify by its hardness (will scratch glass), white color, and lack of cleavage. It is found globally in almost all geological environments, especially in mountain ranges and riverbeds.