mineral

Milky Quartz

Quartz (Silica / Silicon Dioxide - SiO2)

Hardness: 7 on the Mohs scale; Color: Cloudy white to opaque creamy white; Luster: Vitreous (glassy) to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.

Hardness: 7 on the Mohs scale
Color: Cloudy white to opaque creamy white
Luster: Vitreous (glassy) to greasy

Identified March 23, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the crystallization of silica-rich hydrothermal solutions in veins or during the cooling of igneous magma. Its white color is often due to tiny inclusions of gas and liquid trapped during crystal growth. Found in deposits ranging from Precambrian to recent ages.

Uses & applications

Used in industry for glassmaking, abrasives, and as a source of silicon for electronics. In construction, it is used as road metal and decorative stone. Also popular as a basic collector mineral and for metaphysical purposes.

Geological facts

Milky quartz is the most common variety of crystalline quartz on Earth. The white color is caused by microscopic fluid inclusions that scatter light, creating the 'milk' appearance.

Field identification & locations

Identify in the field by its hardness (will scratch glass/knives), lack of cleavage, and translucent to opaque white appearance. Found globally in mountainous regions, riverbeds, and quarries. Collectors look for pieces with large crystalline faces or interesting textures.

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