mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

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

Identified May 29, 2026More mineral →

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Physical properties

Hardness: 7 (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 via hydrothermal activity where mineral-rich water cools in rock fissures, or as a primary constituent in igneous rocks like granite. Its white color is caused by tiny fluid inclusions trapped during growth.

Uses & applications

Used in glass manufacturing, electronics (piezoelectric properties), abrasives, and as decorative stone in landscaping or jewelry cabochons.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky Quartz often occurs in massive forms as veins cutting through other rock types.

Field identification & locations

Identify by its hardness (it will scratch glass), lack of cleavage, and characteristic waxy/glassy appearance. It is found globally in nearly every geological environment.