mineral

Milky Quartz

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 7 Mohs scale; Color: Opaque white to milky; Luster: Vitreous to greasy; Crystal Structure: Hexagonal (trigonal); Cleavage: Indistinct/Conchoidal fracture; Specific Gravity: 2.65.

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

Identified June 2, 2026More mineral →

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Physical properties

Hardness: 7 Mohs scale; Color: Opaque white to milky; Luster: Vitreous to greasy; Crystal Structure: Hexagonal (trigonal); Cleavage: Indistinct/Conchoidal fracture; Specific Gravity: 2.65.

Formation & geological history

Formed in hydrothermal veins and pegmatites through the cooling of silica-rich fluids. It can be found in rocks of all geological ages, from Precambrian to recent formations.

Uses & applications

Used as an abrasive, in the production of glass and ceramics, as a source of silicon for electronics, and in landscaping or decorative gravel.

Geological facts

The milky appearance is caused by tiny fluid inclusions of gas or liquid trapped during the crystal's formation. It is one of the most common mineral varieties on Earth's crust.

Field identification & locations

Identify in the field by its white color, ability to scratch glass (hardness 7), and lack of cleavage. Often found as veins in igneous or metamorphic rocks or as pebbles in riverbeds.