mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Identified July 16, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed in hydrothermal veins, pegmatites, and igneous rocks through the cooling of silica-rich fluids. It is found in geological environments ranging from Precambrian to Cenozoic ages.

Uses & applications

Used in glass manufacturing, as an abrasive, in electronics (quartz oscillators), as a decorative gemstone, and in landscaping.

Geological facts

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

Field identification & locations

Identify by its hardness (it can scratch glass), its white color, and its lack of cleavage. It is found globally in mountainous regions, riverbeds, and gravel pits.