mineral

Milky Quartz

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 (Mohs scale); Color: White to off-white/cream; Luster: Vitreous to greasy; Crystal Structure: Trigonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Hardness: 7 (Mohs scale)
Color: White to off-white/cream
Luster: Vitreous to greasy

Identified July 17, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs scale); Color: White to off-white/cream; Luster: Vitreous to greasy; Crystal Structure: Trigonal; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Formation & geological history

Formed by the cooling of silica-rich hydrothermal fluids in veins or pegmatites. The milky appearance is caused by tiny inclusions of gas and liquid trapped during crystal growth.

Uses & applications

Used in glass making, as an abrasive, in electronics for its piezoelectric properties, and widely in landscaping and home decor.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz is the most common variety of quartz.

Field identification & locations

Identify by its white opaque color, lack of cleavage, and ability to scratch glass. Commonly found in mountains, riverbeds, and as veins within other rock types globally.