mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Hardness: 7 on Mohs scale; Color: Opaque white (milky) due to fluid and gas inclusions; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.

Hardness: 7 on Mohs scale
Color: Opaque white (milky) due to fluid and gas inclusions
Luster: Vitreous to greasy

Identified March 11, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the cooling of hydrothermal solutions or crystallization from silica-rich magma. It is a major component of granitic igneous rocks and is found in veins and pegmatites worldwide across various geological ages.

Uses & applications

Used in the manufacturing of glass and ceramics, as an abrasive, and sometimes in low-cost jewelry (cabochons) or as tumbled stones for decor and metaphysical collections.

Geological facts

Milky Quartz is the most common variety of crystalline quartz. Its white, cloudy appearance is caused by tiny bubbles of gas and liquid trapped during the crystal's growth.

Field identification & locations

Identify in the field by its hardness (scratches glass), lack of cleavage, and characteristic milky-white color. It is commonly found in gravel beds, mountain ranges, and near volcanic sites. Collectors look for well-defined hexagonal crystal points or specimens with interesting inclusions.