mineral

Hematite Nodule

Iron oxide, Fe2O3

Hardness: 5.5 to 6.5 on the Mohs scale. Color: Dark reddish-brown to steel-gray or black. Luster: Metallic to submetallic or earthy. Crystal Structure: Trigonal. Specific Gravity: 5.26.

Hardness: 5
Color: Dark reddish-brown to steel-gray or black
Luster: Metallic to submetallic or earthy

Identified August 3, 2026More mineral →

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Physical properties

Hardness: 5.5 to 6.5 on the Mohs scale. Color: Dark reddish-brown to steel-gray or black. Luster: Metallic to submetallic or earthy. Crystal Structure: Trigonal. Specific Gravity: 5.26.

Formation & geological history

Forms in diverse environments, particularly hydrothermal veins, sedimentary rocks, and as weathering products of iron-rich minerals over millions of years.

Uses & applications

Primary ore of iron, used in pigment production, jewelry, and metaphysical healing practices.

Geological facts

Hematite is the most important ore of iron in terms of total world production and is also found on Mars, contributing to the planet's reddish appearance.

Field identification & locations

Easily identified in the field by its characteristic reddish-brown streak on an unglazed porcelain plate, high specific gravity (feels heavy for its size), and dark metallic luster.