mineral

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

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

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

Identified March 29, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Milky white to opaque; 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. Milky quartz specifically gets its appearance from macroscopic inclusions of fluids trapped during crystal growth. They can range from Precambrian to modern ages.

Uses & applications

Used in glassmaking, abrasives, foundry sand, and as a source of silicon for electronics. In jewelry, it is used for cabochons or beads. Also popular in landscaping and as a 'healing crystal' in metaphysical circles.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz is the most common variety of crystalline quartz. It can often be an indicator mineral for gold in quartz vein deposits.

Field identification & locations

Identify in the field by its ability to scratch glass and steel, its white 'milky' opacity, and lack of cleavage. Commonly found globally in mountains, riverbeds, and as garden stones. Collectors should look for unique crystal terminations.