mineral

Milky Quartz

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness of 7 on the Mohs scale, white to translucent color, vitreous to greasy luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.

Identified August 6, 2026More mineral →

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Physical properties

Hardness of 7 on the Mohs scale, white to translucent color, vitreous to greasy luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.

Formation & geological history

Forms primarily from hydrothermal solutions in veins and cavities, as well as an essential component in many igneous, metamorphic, and sedimentary rocks. Can form over millions of years in varying geological environments.

Uses & applications

Used in glassmaking, abrasives, foundry sands, electronics (piezoelectric properties), and lapidary arts or specimen collecting.

Geological facts

Milky quartz is the most common variety of the quartz family. The milky appearance is caused by minute fluid inclusions of gas or liquid trapped during crystal growth.

Field identification & locations

Easily identified by its white, cloudy appearance, high hardness (scratches glass), and conchoidal fracture. Found worldwide in almost all geological environments.