Ferruginous Quartz

Physical Properties

Hardness: 7; Color: Clear to white with brown/rust-orange staining; Luster: Vitreous; Crystal Structure: Trigonal; Cleavage: None; Specific Gravity: 2.65

Formation & Geological History

Formed through hydrothermal processes in veins or as a secondary deposit. The rusty coloring is due to the presence of iron oxides like hematite or limonite leaching into the quartz fractures over geological time.

Uses & Applications

Primarily used as a decorative specimen for collectors or in metaphysical practices. Pure quartz is used in electronics and glass-making, though iron-stained specimens are less industrially viable.

Geological Facts

Also known as Iron Quartz or Hematoid Quartz. The iron can be either a coating on the surface of the crystals or an inclusion trapped inside the quartz as it grew.

Field Identification & Locations

Identify in the field by its distinct hardness (scratches glass) and its association with rusted or oxidized host rock environment. Found worldwide, especially in areas with significant iron ore deposits.

Identified on: 4/22/2026

Mode: Standard