mineral

Likely specular hematite

Hematite (Fe₂O₃), probably a micaceous/specular variety

AI-generated identification · may be incorrect

Black to steel-gray, strongly metallic to submetallic luster with glittering platy surfaces; typically opaque and brittle, Mohs hardness 5–6.5, specific gravity about 5.0–5.3, with no prominent cleavage and a reddish-brown streak. The image is insufficient to distinguish it confidently from magnetite.

Identified August 20, 2026More mineral →

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Physical properties

Formation & geological history

Forms through oxidation of iron-rich rocks, hydrothermal processes, or sedimentary iron formation; specimens may be very ancient, commonly Precambrian. Around Alice Springs, iron oxides can occur in weathered rocks and mineralized zones, though a precise locality cannot be determined visually.

Uses & applications

Used as an iron ore, pigment, polishing material, and ornamental/collecting specimen; attractive metallic pieces are sold as curiosities rather than high-value gems.

Geological facts

The diagnostic test is streak: hematite leaves a red to reddish-brown streak, whereas magnetite leaves a black streak and is strongly magnetic.

Field identification & locations

Test with an unglazed ceramic tile and a magnet. If the streak is black and magnetism is strong, identify it as magnetite (Fe₃O₄); if red-brown and weakly magnetic, hematite is favored. The handwritten label appears to say “Flint …,” but the specimen does not look like ordinary flint.