Rock Identifier
Milky Quartz (Silicon Dioxide (SiO2)) — mineral
mineral

Milky Quartz

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

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

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Physical properties

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

Formation & geological history

Forms primarily from hydrothermal veins, cooling magma, and metamorphic environments worldwide across various geological ages.

Uses & applications

Used in ornamental carvings, gemstone collections, and industrial silica sources.

Geological facts

Milky quartz is the most common variety of crystalline quartz, colored white by microscopic fluid inclusions trapped during its formation.

Field identification & locations

Easily identified by its high hardness (scratches glass), white milky appearance, and lack of cleavage; found globally in pegmatites and quartz veins.