mineral

Quartz with Iron Oxide Staining

SiO2

AI-generated identification · may be incorrect

Hardness of 7 on the Mohs scale, typically white or clear but stained orange/brown, vitreous luster, hexagonal crystal system, conchoidal fracture, specific gravity 2.65

Identified September 19, 2026More mineral →

Explore Quartz with Iron Oxide Staining in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

Physical properties

Hardness of 7 on the Mohs scale, typically white or clear but stained orange/brown, vitreous luster, hexagonal crystal system, conchoidal fracture, specific gravity 2.65

Formation & geological history

Formed in igneous, metamorphic, or sedimentary environments. The orange/brown color comes from iron oxides (like hematite or goethite) that stained the quartz during or after its formation.

Uses & applications

Common quartz has many industrial uses (glassmaking, electronics). Iron-stained varieties might be collected by rockhounds or tumbled for decorative purposes, though small rough pieces like this are mostly of personal interest.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Iron staining is a very common feature in surface-collected quartz.

Field identification & locations

Identified by its hardness (scratches glass), lack of cleavage, and vitreous luster on fresh surfaces. Found worldwide in nearly all geological environments.