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.

Identified More mineral →
Explore Milky Quartz in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

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 and cooling magma chambers in igneous, metamorphic, and sedimentary environments globally.

Uses & applications

Used in glassmaking, abrasives, electronics oscillators, and as ornamental or decorative stone.

Geological facts

Milky quartz is the most common variety of crystalline quartz found on Earth, often appearing white due to microscopic fluid inclusions trapped during formation.

Field identification & locations

Easily identified by its high hardness (scratches glass), lack of cleavage, and characteristic cloudy white appearance. Found worldwide.