mineral

Milky Quartz

Silicon Dioxide (SiO2)

Hardness: 7 on the Mohs scale; Color: Milky white to translucent; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Hardness: 7 on the Mohs scale
Color: Milky white to translucent
Luster: Vitreous to greasy

Identified March 6, 2026More mineral →

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Physical properties

Hardness: 7 on the Mohs scale; Color: Milky white to translucent; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Formation & geological history

Formed through the cooling of silica-rich hydrothermal veins or within igneous pegmatites. The white color is caused by tiny fluid inclusions of gas or liquid trapped during crystal growth. They are found across all geological ages.

Uses & applications

Used as a source of silica for glassmaking, abrasives, and electronics. Common in landscaping, decorative gravel, and lower-end jewelry/healing crystals.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz specifically gets its appearance from 'ghostly' microscopic bubbles that scatter light within the crystal lattice.

Field identification & locations

Identified in the field by its hardness (it will scratch glass), lack of cleavage, and white opaque appearance. Frequently found in mountainous regions, riverbeds, and desert 'pavements' like the one pictured.