mineral

Hematite Nodule

Hematite (Alpha Fe2O3)

AI-generated identification · may be incorrect

Hardness: 5.5-6.5; Color: Dark grey to reddish-brown; Luster: Metallic to earthy; Structure: Trigonal/Hexagonal; Cleavage: None; Specific Gravity: 5.26.

Hardness: 5
Color: Dark grey to reddish-brown
Luster: Metallic to earthy

Identified July 12, 2026More mineral →

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Physical properties

Hardness: 5.5-6.5; Color: Dark grey to reddish-brown; Luster: Metallic to earthy; Structure: Trigonal/Hexagonal; Cleavage: None; Specific Gravity: 5.26.

Formation & geological history

Formed as a primary mineral or as an alteration product in hydrothermal veins, sedimentary iron formations, or through the weathering of iron-rich minerals. Often found in BIF (Banded Iron Formations).

Uses & applications

Main ore of iron; also used in jewelry as beads, pigments for coloring, and industrial radiation shielding.

Geological facts

Hematite’s name is derived from the Greek word for 'blood' because it produces a dark red streak when powdered or scratched.

Field identification & locations

Identified by its high density and characteristic rust-red streak on a porcelain plate. Common in areas with ancient water activity or iron-rich sedimentary basins.