Mineral

Specular Hematite with Quartz

Ferric oxide (Fe2O3) and Silicon dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness: 5.5-6.5 (hematite) and 7 (quartz); Color: Steel gray to deep reddish-brown; Luster: Metallic to sub-metallic; Crystal structure: Trigonal; Cleavage: None/Indistinct; Specific Gravity: 5.26.

Hardness: 5
Color: Steel gray to deep reddish-brown
Luster: Metallic to sub-metallic

Identified April 11, 2026More mineral →

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Physical properties

Hardness: 5.5-6.5 (hematite) and 7 (quartz); Color: Steel gray to deep reddish-brown; Luster: Metallic to sub-metallic; Crystal structure: Trigonal; Cleavage: None/Indistinct; Specific Gravity: 5.26.

Formation & geological history

Formed through hydrothermal processes, precipitation from aqueous fluids, or as a secondary mineral during the oxidation of iron-rich sediments. Often found in Banded Iron Formations (BIFs).

Uses & applications

Primary ore of iron for steel manufacturing; used in pigments (ochre), polishing compounds (jeweler's rouge), and occasionally as semi-precious gemstones in jewelry.

Geological facts

Hematite is the mineral responsible for the red color of many rocks on Earth and the characteristic reddish hue of the planet Mars. Specular hematite is a variety that contains small, mirror-like mica-looking flakes.

Field identification & locations

Identify in the field by its characteristic 'cherry red' streak when rubbed against an unglazed porcelain plate. Look for the metallic glitter (specularity) combined with heavy weight (high density). Common in iron mining districts like the Lake Superior region.