mineral

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale. Color: White/Translucent. Luster: Vitreous to greasy. Crystal structure: Hexagonal (trigonal). Cleavage: None (conchoidal fracture). Specific gravity: 2.65.

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

Identified July 5, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale. Color: White/Translucent. Luster: Vitreous to greasy. Crystal structure: Hexagonal (trigonal). Cleavage: None (conchoidal fracture). Specific gravity: 2.65.

Formation & geological history

Formed through the cooling and crystallization of silica-rich magma or from hydrothermal veins. This specimen likely originated in the Greater Caucasus mountains, which are rich in metamorphic and igneous rocks featuring massive quartz veins.

Uses & applications

Used in glassmaking, abrasives, electronics (due to piezoelectric properties), and as a gemstone or decorative stone for collectors.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz gets its cloudy appearance from minute fluid inclusions of gas and/or liquid trapped during crystal growth.

Field identification & locations

Identify in the field by its inability to be scratched by a steel knife and its lack of cleavage. Common in the Western Caucasus region in hydrothermal veins penetrating granite or schist formations.