mineral

Milky Quartz

Silicon Dioxide (SiO2)

Hardness: 7 on the Mohs scale; Color: Cloudy white due to microscopic fluid inclusions; Luster: Vitreous to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.

Hardness: 7 on the Mohs scale
Color: Cloudy white due to microscopic fluid inclusions
Luster: Vitreous to greasy

Identified March 5, 2026More mineral →

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Physical properties

Formation & geological history

Formed in hydrothermal veins and pegmatites through the cooling and crystallization of silica-rich solutions. It occurs in various geological ages and is one of the most common crustal minerals.

Uses & applications

Used in glassmaking, as an abrasive, in the electronics industry for its piezoelectric properties, in landscaping, and as a semi-precious gemstone in jewelry or for metaphysical collecting.

Geological facts

The milky white opacity is caused by thousands of tiny gas and liquid bubbles trapped during the crystal's growth. It is the official state mineral of Arkansas and is found globally.

Field identification & locations

Identify in the field by its white color, ability to scratch glass, and lack of cleavage (it breaks in curved, glassy flakes). Often found in riverbeds, mountain outcrops, and glacial deposits.