mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Hardness: 7 (Mohs scale)
Color: White to cloudy translucent
Luster: Vitreous to greasy

Identified February 22, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed through the crystallization of silica-rich hydrothermal solutions or within igneous pegmatites. The cloudy appearance is caused by tiny inclusions of gas or liquid trapped during crystal growth. Can be found in geological formations ranging from billions of years old to relatively recent.

Uses & applications

Used in the manufacturing of glass and ceramics, as an abrasive in sandblasting, in the construction of countertops (engineered stone), and as a semi-precious stone for lapidary work and landscaping.

Geological facts

Quartz is the most abundant mineral in the Earth's continental crust. Milky quartz is often found in massive form rather than distinct crystals. It is frequently associated with gold deposits in 'hydrothermal veins,' making it an important indicator for prospectors.

Field identification & locations

Identify in the field by its hardness (it easily scratches glass), white color, and lack of cleavage (it breaks into irregular, curved shards). Commonly found in mountain ranges, riverbeds, and as veins in metamorphic rocks. Collectors should look for unique shapes or associations with other minerals.