mineral

Hematite (specular ironstone)

Hematite, α-Fe₂O₃

AI-generated identification · may be incorrect

Likely a dense, iron-rich specimen with a dark reddish-brown to gray surface and uneven, possibly botryoidal texture. Hematite has Mohs hardness 5–6, metallic to earthy luster, trigonal crystal structure, and no true cleavage; a reddish streak is diagnostic.

Identified October 7, 2026More mineral →

Explore Hematite (specular ironstone) in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Forms through oxidation of iron-rich minerals and precipitation from iron-bearing waters, in many settings from ancient sedimentary deposits to hydrothermal veins. The specimen’s age and exact origin cannot be determined from the image.

Uses & applications

Used chiefly as iron ore and pigment; attractive polished or crystalline pieces are collected, though this specimen appears modest in display quality.

Geological facts

Despite its dark appearance, hematite typically leaves a red-brown streak on unglazed porcelain.

Field identification & locations

Common worldwide, including major deposits in Australia, Brazil, and the United States. Check density and streak; image alone cannot confirm identification or distinguish it from other iron-rich minerals.