mineral

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

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

Hardness: 7 on Mohs scale
Color: Translucent white to milky
Luster: Vitreous to greasy

Identified June 14, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed during the final stages of hydrothermal mineral deposits and in pegmatites. The milky appearance is caused by tiny fluid 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 or as a basic collector's specimen.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Milky quartz is the most common variety of quartz and can often contain traces of gold in certain geological veins.

Field identification & locations

Identify by its hardness (it scratches glass), conchoidal fracture, and lack of cleavage. Often found in mountain ranges, pebble beaches, and riverbeds globally.