mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Hardness: 7 on Mohs scale. Color: White to translucent. Luster: Vitreous (glassy) to greasy. Crystal structure: Hexagonal/Trigonal. Cleavage: None (conchoidal fracture). Specific Gravity: 2.65.

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

Identified April 6, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale. Color: White to translucent. Luster: Vitreous (glassy) to greasy. Crystal structure: Hexagonal/Trigonal. Cleavage: None (conchoidal fracture). Specific Gravity: 2.65.

Formation & geological history

Formed through the crystallization of silica-rich hydrothermal solutions or cooling magma. Milky quartz gets its appearance from tiny fluid inclusions of gas or liquid trapped during crystal growth. It is found in igneous, metamorphic, and sedimentary environments across all geological ages.

Uses & applications

Used as a source of silicon for electronics, as an abrasive, in glassmaking, and in landscaping. White quartz is often used in jewelry as beads or cabochons and is highly popular among crystal collectors for decorative or spiritual purposes.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz is the most common variety of quartz. Some milky quartz gold-bearing veins are significant sources for gold mining.

Field identification & locations

Identify in the field by its hardness (it will scratch glass), its lack of cleavage, and its characteristic waxy or glassy luster. It is ubiquitous globally, especially in mountain ranges and stream beds.