mineral

Magnetite / Hematite (Iron Ore)

Magnetite (Fe3O4) or Hematite (Fe2O3)

AI-generated identification · may be incorrect

Hardness: 5.5-6.5 on Mohs scale. Color: Dark iron-black to metallic grey. Luster: Metallic to submetallic. Cleavage: None (parting present). Specific Gravity: 5.1-5.2 (very heavy and dense feel).

Hardness: 5
Color: Dark iron-black to metallic grey
Luster: Metallic to submetallic

Identified July 24, 2026More mineral →

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Physical properties

Hardness: 5.5-6.5 on Mohs scale. Color: Dark iron-black to metallic grey. Luster: Metallic to submetallic. Cleavage: None (parting present). Specific Gravity: 5.1-5.2 (very heavy and dense feel).

Formation & geological history

Formed in igneous, metamorphic, and sedimentary environments, often found as banded iron formations (BIFs) or skarn deposits created by contact metamorphism.

Uses & applications

Primary ore of iron and steel production. Also used as a heavy media in mineral processing, as a catalyst, and for lapidary carving or decorative display specimens.

Geological facts

Magnetite is naturally magnetic and is one of the most magnetic minerals on Earth. Naturally magnetized pieces are called lodestones, which were used as early magnetic compasses.

Field identification & locations

Identify by its dark metallic black color, high density (feels heavy for its size), strong attraction to magnets (if magnetite), and dark streak (black for magnetite, reddish-brown for hematite).