mineral

Milky Quartz

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

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

Hardness: 7 on Mohs scale
Color: White to cloudy
Luster: Vitreous to greasy

Identified May 21, 2026More mineral →

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Physical properties

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

Formation & geological history

Forms through the crystallization of silica-rich hydrothermal solutions in veins or during the cooling of igneous pegmatites. It is found in all geological ages where hydrothermal activity has occurred.

Uses & applications

Used in glassmaking, abrasives, electronics (as a source of silicon), and as a gemstone or decorative garden stone.

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 crust.

Field identification & locations

Identify by its hardness (scratches glass), lack of cleavage, and white opaque color. It is ubiquitously found in mountain ranges, riverbeds, and as veins in metamorphic and igneous rocks.