mineral

Botryoidal hematite–goethite specimen

Hematite (Fe₂O₃) with goethite (FeO(OH)), possibly minor manganese oxides

AI-generated identification · may be incorrect

Black to steel-gray, strongly metallic to submetallic luster, with rough botryoidal and earthy surfaces; hematite hardness 5–6.5 Mohs and specific gravity about 5.0–5.3. It commonly leaves a red-to-reddish-brown streak; goethite may produce a yellow-brown streak.

Identified September 4, 2026More mineral →

Explore Botryoidal hematite–goethite specimen 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 as an oxidation-product ore in hydrothermal veins, weathered iron deposits, and cavities, commonly replacing or coating earlier minerals. The specimen’s exact geological age cannot be determined from the photograph.

Uses & applications

Used as iron ore and pigment; attractive botryoidal pieces are collected, while polished hematite is used in inexpensive jewelry and carvings.

Geological facts

Hematite’s diagnostic red streak can remain red even when the specimen appears nearly black. The pale metallic patch may be quartz, calcite, or another associated mineral rather than hematite.

Field identification & locations

Test an inconspicuous area for a red-brown streak and compare its unusually high heft; avoid relying on magnetism, which is typically weak or absent. Common sources include Brazil, Morocco, China, the United States, and Australia.