mineral

Milky quartz vein rock

Quartz (SiO₂), likely massive vein quartz with minor iron staining or host-rock inclusions

AI-generated identification · may be incorrect

Opaque white to pale gray, with a vitreous-to-dull luster and irregular fracture; quartz has Mohs hardness 7, trigonal crystal structure, no cleavage, and specific gravity about 2.65. The specimen’s rough, elongated shape and visible fractures are consistent with vein quartz, though a photo cannot confirm exact composi…

Identified October 9, 2026More mineral →

Explore Milky quartz vein rock in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

Physical properties

Formation & geological history

Forms when silica-rich fluids fill cracks and cool, commonly during hydrothermal activity; quartz veins occur in rocks of many ages. The pictured specimen’s age and precise geological setting cannot be determined from appearance alone.

Uses & applications

Used as a silica source in glass, ceramics, and other industrial products; attractive pieces may be polished or kept as inexpensive display specimens.

Geological facts

Quartz is one of Earth’s most abundant minerals. Its lack of cleavage and hardness help distinguish it from many white minerals.

Field identification & locations

Look for hardness sufficient to scratch glass, no obvious cleavage, and a glassy appearance on fresh fractures; common worldwide in veins and pegmatites. A basic rough specimen like this is typically worth about $1–$10 USD.