mineral

Milky Quartz

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Mohs hardness: 7. Color: White to translucent. Luster: Vitreous to greasy. Crystal structure: Trigonal/Hexagonal. Cleavage: Indistinct/Conchoidal fracture. Specific gravity: 2.65.

Hardness: 7
Color: White to translucent
Luster: Vitreous to greasy

Identified July 2, 2026More mineral →

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Physical properties

Mohs hardness: 7. Color: White to translucent. Luster: Vitreous to greasy. Crystal structure: Trigonal/Hexagonal. Cleavage: Indistinct/Conchoidal fracture. Specific gravity: 2.65.

Formation & geological history

Forms in hydrothermal veins or as a primary constituent of igneous rocks like granite. The milky white color is caused by microscopic fluid inclusions of gas or liquid trapped during crystal growth.

Uses & applications

Used in glassmaking, abrasives, silicon production for electronics, and occasionally as decorative stone or in landscaping.

Geological facts

Quartz is the second most abundant mineral in the Earth's continental crust. Milky quartz is the most common variety of quartz found in nature.

Field identification & locations

Identify by its hardness (will scratch glass), white color, and the way it breaks into curved shell-like patterns (conchoidal fracture). It is found globally in almost all geological environments.