mineral

Botryoidal hematite (specular/earthy hematite)

Hematite, Fe₂O₃

AI-generated identification · may be incorrect

Black to steel-gray, metallic to submetallic luster, with rounded botryoidal and flow-like surfaces; hardness 5–6.5 Mohs, specific gravity about 5.3, opaque, and commonly lacking visible cleavage. The dark coating may obscure its diagnostic red-brown streak.

Identified September 4, 2026More mineral →

Explore Botryoidal hematite (specular/earthy hematite) 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 mainly by oxidation and precipitation of iron-rich fluids, commonly in hydrothermal veins, sedimentary iron formations, and weathering zones; specimens may range from Precambrian to recent. The sculpted appearance can result from botryoidal growth or replacement textures.

Uses & applications

Used as an iron ore, pigment, polishing abrasive, and occasionally as a collectible or ornamental stone; it is not typically a jewelry gemstone in this rough form.

Geological facts

Hematite’s most reliable test is a reddish-brown to cherry-red streak on unglazed porcelain, even when the specimen appears black. It is weakly magnetic or nonmagnetic unless mixed with magnetite.

Field identification & locations

Common localities include Brazil, England, the United States, Morocco, and Australia. Test streak rather than relying on color; magnetism alone cannot distinguish hematite from magnetite.