mineral

Milky Quartz

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Opaque white to translucent; Luster: Vitreous 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 to greasy

Identified March 25, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Opaque white to translucent; Luster: Vitreous 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 milky appearance is caused by tiny inclusions of gas or liquid trapped during crystal growth. Can be found in geological formations spanning billions of years.

Uses & applications

Used in glassmaking, abrasives, and as a source of silicon for electronics. In jewelry, it is often used as tumbled stones, beads, or decorative carvings. Also popular in the metaphysical community.

Geological facts

Milky Quartz is the most common variety of crystalline quartz. Historically, it was used by ancient civilizations for stone tools and carvings due to its hardness and abundance.

Field identification & locations

Identify by its 'cloudy' white appearance, lack of cleavage, and ability to scratch glass. Widely found globally in mountains, riverbeds, and beaches. For collectors, look for unique shapes or associations with other minerals.