mineral

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

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

Identified April 10, 2026More mineral →

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Physical properties

Hardness: 7 on 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 and crystallization of silica-rich magma or from hydrothermal veins. Milky quartz specifically gets its appearance from numerous microscopic fluid inclusions trapped during the crystal's growth.

Uses & applications

Used in glass manufacturing, electronics (due to piezoelectric properties), abrasives, and as a popular material for carvings, figurines (like the hippo shown), and jewelry.

Geological facts

Quartz is one of the most abundant minerals in Earth's continental crust. Its name comes from the German word 'quarz', which has roots in Slavic and Polish words meaning 'hard'.

Field identification & locations

Identify in the field by its hardness (it can scratch glass), its lack of cleavage, and its waxy or vitreous luster. It is found globally in igneous, metamorphic, and sedimentary environments.