mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

AI-generated identification · may be incorrect

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

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

Identified April 5, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed from the cooling of silica-rich hydrothermal veins or magma. Its milky appearance is caused by microscopic fluid inclusions trapped during crystal growth. Found in all geological ages.

Uses & applications

Used in glassmaking, abrasives, electronics (piezoelectric properties), and as a gemstone or decorative landscape stone.

Geological facts

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

Field identification & locations

Identify in the field by its hardness (cannot be scratched by a steel knife), glassy luster when clean, and lack of cleavage. Often found as veins in host rocks or as rounded pebbles in stream beds.