mineral

Milky quartz

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Hardness 7 Mohs; white to translucent with a glassy-to-waxy luster and irregular fracture. Trigonal crystal structure, but this specimen shows no distinct crystal faces.

Identified September 26, 2026More mineral →

Explore Milky quartz in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

Physical properties

Hardness 7 Mohs; white to translucent with a glassy-to-waxy luster and irregular fracture. Trigonal crystal structure, but this specimen shows no distinct crystal faces.

Formation & geological history

Forms when silica-rich fluids crystallize in veins or cavities, and also occurs in many igneous and metamorphic rocks. Quartz spans much of Earth’s geological history; the specimen’s specific age cannot be determined from the image.

Uses & applications

Used as a decorative and lapidary material, in carvings and jewelry, and as a source of silica for glass and industrial products.

Geological facts

Its cloudy appearance comes from microscopic fluid or gas inclusions and internal defects that scatter light.

Field identification & locations

Common worldwide, including in quartz veins, pegmatites, and gravel. Glassy luster, hardness (scratches glass), and lack of cleavage help distinguish it; the image alone cannot confirm the identification.