mineral

Milky Quartz

Silicon Dioxide (SiO2)

Hardness: 7 (Mohs), Color: Milky white to cloudy, Luster: Vitreous to greasy, Crystal structure: Trigonal (hexagonal prisms), Cleavage: None (conchoidal fracture), Specific Gravity: 2.65

Identified July 15, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs), Color: Milky white to cloudy, Luster: Vitreous to greasy, Crystal structure: Trigonal (hexagonal prisms), Cleavage: None (conchoidal fracture), Specific Gravity: 2.65

Formation & geological history

Found in various geological environments, commonly in hydrothermal veins and as a primary mineral in igneous rocks like granite. The white color is caused by tiny inclusions of liquid or gas trapped during crystal formation.

Uses & applications

Used in construction as aggregate, in glass manufacturing, as an abrasive, and frequently collected as mineral specimens or used in metaphysical practices.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz is often the most common variety found in the field.

Field identification & locations

Identify by its ability to scratch glass and lack of cleavage. It is found globally in mountains, riverbeds, and as garden gravel. Common in quartz veins with metallic ores.