mineral

Milky Quartz

Quartz (SiO2)

AI-generated identification · may be incorrect

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

Hardness: 7 on the Mohs scale
Color: White to off-white/milky
Luster: Vitreous to greasy

Identified May 29, 2026More mineral →

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Physical properties

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

Formation & geological history

Forms in hydrothermal veins or as a late-stage crystallization in igneous rocks like granite. The milky appearance is caused by tiny inclusions of gas or liquid trapped during crystal growth.

Uses & applications

Used in glassmaking, as an abrasive, in electronics for its piezoelectric properties, and widely used in landscaping and jewelry as semi-precious stones.

Geological facts

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

Field identification & locations

Identify by its white color, ability to scratch glass (hardness 7), and lack of cleavage planes. It is found globally in mountainous terrains and as river pebbles.