mineral

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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

Identified July 1, 2026More mineral →

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Physical properties

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

Formation & geological history

Formation occurs in hydrothermal veins and pegmatites through the cooling of silica-rich solutions in the Earth's crust. It can form in various geological ages and is highly resistant to weathering.

Uses & applications

Used in glass manufacturing, electronics (due to its piezoelectric properties), construction material, and as a decorative stone in gardening or low-cost jewelry.

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 continental crust.

Field identification & locations

Identified in the field by its white color, inability to be scratched by a steel knife, and lack of cleavage. Commonly found along riverbeds, beaches, and mountain trails.