mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Hardness: 7 on Mohs scale; Color: Cloudy white to pale translucent; Luster: Vitreous to greasy; Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Cloudy white to pale translucent
Luster: Vitreous to greasy

Identified March 16, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Cloudy white to pale translucent; Luster: Vitreous to greasy; Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Formed through the crystallization of magma or from hydrothermal veins. The milky appearance is caused by tiny inclusions of gas and/or liquid trapped during crystal growth. They can be found in geological environments ranging from Precambrian to Cenozoic.

Uses & applications

Used in glassmaking, as an abrasive, in the production of silicon metal for electronics, and widely used in jewelry (tumbled stones) and home decor/landscaping.

Geological facts

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

Field identification & locations

Identify by its ability to scratch glass, its lack of cleavage, and its waxy or vitreous luster. Commonly found in riverbeds, gravel pits, and mountainous regions worldwide. Collectors look for unique inclusions or natural crystal faces.