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 July 12, 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

Formed through the crystallization of silica-rich hydrothermal fluids in veins or as a primary constituent in igneous rocks like granite and pegmatites. It is found in geological formations across all ages.

Uses & applications

Used in glassmaking, abrasives, as a flux in smelting, and in the production of silicon wafers for electronics. It is also common in landscaping, crystal healing, and as decorative stone.

Geological facts

The milky white color is caused by tiny fluid inclusions of gas or liquid trapped during the crystal's growth. It is one of the most abundant minerals in the Earth's crust.

Field identification & locations

Identify by its ability to scratch glass, its lack of cleavage, and its milky opaque appearance. It is found worldwide, especially in mountainous regions and riverbeds.