mineral

Milky Quartz

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

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

Identified June 18, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed through the molten crystallization of magma or by precipitation from hydrothermal veins. The milky appearance is caused by tiny inclusions of gas and/or liquid trapped during crystal growth.

Uses & applications

Used in decorative landscaping, glass manufacturing, quartz oscillators for electronics, and as a popular semi-precious stone for beginner collectors and jewelry tumbled stones.

Geological facts

Milky quartz is the most common variety of crystalline quartz. Historically, it was used by many ancient cultures for stone tools and ritual objects due to its abundance and hardness.

Field identification & locations

Identify in the field by its waxy luster and ability to scratch glass. It is commonly found in riverbeds, mountain ranges, and within quartz veins of metamorphic and igneous rocks globally.