mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Identified July 7, 2026More mineral →

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Physical properties

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

Formation & geological history

Forms in hydrothermal veins and pegmatites through the cooling and crystallization of silica-rich fluids. It can be found in virtually all geological environments and ages.

Uses & applications

Used as a gemstone (decorative), in glass making, as an abrasive, and in the electronics industry due to its piezoelectric properties.

Geological facts

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

Field identification & locations

Identify in the field by its hardness (will scratch glass), white color, and lack of cleavage. Common in gravels, river beds, and as veins in metamorphic or igneous outcrops.