mineral

Polished Hematite Tower

Hematite (Fe2O3)

Mohs hardness 5.5-6.5, metallic to sub-metallic luster, dark gray to metallic black or silvery-black color, red-brown streak, trigonal crystal system, opaque, high specific gravity (approx. 5.26).

Identified July 24, 2026More mineral →

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Physical properties

Mohs hardness 5.5-6.5, metallic to sub-metallic luster, dark gray to metallic black or silvery-black color, red-brown streak, trigonal crystal system, opaque, high specific gravity (approx. 5.26).

Formation & geological history

Forms primarily as a secondary mineral through alteration processes in sedimentary rocks, banded iron formations (BIFs), or hydrothermal veins and volcanic sublimate deposits.

Uses & applications

Extensively used as the primary ore of iron for steel production. Highly popular as carved and polished lapidary pieces like crystal towers, beads, figurines, and jewelry due to its sleek metallic finish.

Geological facts

Despite appearing metallic dark gray or black, when scratched or ground into a fine powder, hematite leaves a characteristic reddish-brown streak, which earned it its name from the Greek word for blood, 'haima'.

Field identification & locations

Identified by its cold feel, high density (unusually heavy for its size), metallic sheen, and red-brown streak when tested on an unglazed porcelain plate. Commonly found in major iron-ore mining districts in Brazil, Australia, China, Russia, and around Lake Superior in North America.