mineral

Milky Quartz

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Opaque white to translucent; Luster: Vitreous to greasy; Crystal Structure: Hexagonal (trigonal); Cleavage: Indistinct/Conchoidal fracture; Specific Gravity: 2.65

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

Identified March 20, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Opaque white to translucent; Luster: Vitreous to greasy; Crystal Structure: Hexagonal (trigonal); Cleavage: Indistinct/Conchoidal fracture; Specific Gravity: 2.65

Formation & geological history

Forms in hydrothermal veins, pegmatites, and igneous rocks. The cloudy/milky appearance is caused by tiny inclusions of gas or liquid trapped during crystal growth. Can be from any geological age.

Uses & applications

Primary source of silica for glass and ceramics; used in construction aggregates, abrasive manufacturing, and as ornamental tumbled stones for metaphysical use or landscaping.

Geological facts

Milky Quartz is the most common variety of crystalline quartz. Historically, it was used by many cultures to produce stone tools before the metal ages. It remains one of the most abundant minerals on Earth's crust.

Field identification & locations

Identify in the field by its distinct waxy luster when tumbled and its inability to be scratched by a steel knife. It is found globally, especially in mountain ranges and riverbeds. Collectors look for pieces with interesting inclusions or unique shapes.