mineral

Polished hematite sphere

Hematite (Fe₂O₃), likely a polished specular or massive variety

AI-generated identification · may be incorrect

Metallic to submetallic gray-black luster; opaque, smooth, and strongly reflective when polished. Mohs hardness 5–6.5, trigonal crystal structure, no prominent cleavage, specific gravity about 5.0–5.3; leaves a red-to-reddish-brown streak.

Identified August 8, 2026More mineral →

Explore Polished hematite sphere 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 in sedimentary, hydrothermal, and metamorphic environments. Hematite deposits range from Precambrian banded iron formations to younger weathering zones.

Uses & applications

Used as an iron ore, pigment, polishing compound, and ornamental stone for spheres, beads, and carvings; generally inexpensive as a decorative specimen.

Geological facts

The name derives from Greek haima, “blood,” referring to its red streak or powder. Its glossy black appearance can resemble magnetite, but hematite is usually weakly magnetic or nonmagnetic.

Field identification & locations

Confirm with a streak test on unglazed porcelain: hematite produces a red-brown streak, unlike magnetite’s black streak. Common sources include Brazil, Australia, China, the United States, and South Africa.