mineral

Likely polished dark stone or mineral fragment

Indeterminate; possibly hematite, magnetite, or dark basalt

AI-generated identification · may be incorrect

Small rounded black-gray specimen with a dull to faintly vitreous luster; hardness may range from about 5.5–6.5 for basalt or magnetite to 6–6.5 for hematite. Grain, crystal structure, streak, magnetism, and density are not resolvable from the image.

Identified September 20, 2026More mineral →

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Physical properties

Formation & geological history

Could be an igneous basalt fragment or a naturally occurring iron-oxide mineral, formed through volcanic cooling or oxidation of iron-bearing rocks. Geological age and locality cannot be determined visually.

Uses & applications

Common dark stones are used as aggregate, lapidary material, curios, or jewelry beads; hematite and magnetite may also be collected for their metallic appearance or magnetic properties.

Geological facts

The image lacks scale and diagnostic detail, so a precise identification is not reliable. A magnet, unglazed-porcelain streak test, and close inspection of texture would be useful.

Field identification & locations

Test whether it attracts a magnet, leaves a red-brown streak (hematite), or a black streak (magnetite); basalt typically shows fine granular texture and no strong magnetism. Common sources include volcanic terrains and iron-rich deposits.