mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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

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

Identified March 22, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed through the cooling of silica-rich magma or from hydrothermal veins. The white color is caused by tiny fluid inclusions of gas or liquid trapped during crystal growth. Can be found in rocks of various ages ranging from billions of years old to relatively recent deposits.

Uses & applications

Used in glass manufacturing, as an abrasive in sandblasting, in construction as aggregate, and occasionally in jewelry as cabochons. It is also highly sought after by mineral collectors for its metaphysical associations and decorative appeal.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky Quartz is the most common variety of quartz. In ancient times, some cultures believed quartz was permanently frozen ice because it was found in mountainous regions.

Field identification & locations

Identify in the field by its ability to scratch glass, its milky white appearance, and lack of cleavage. It is extremely common worldwide, frequently found in riverbeds, gravel pits, and mountain ranges. It is an excellent indicator of hydrothermal activity.