mineral

Unidentified dark rock fragment

Likely fine-grained mafic mineral aggregate; exact identification requires testing

AI-generated identification · may be incorrect

Small, irregular, dark gray-green specimen with dull to slightly glassy luster and possible rough fracture; hardness, cleavage, and specific gravity cannot be reliably determined from the image.

Identified August 22, 2026More mineral →

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Physical properties

Small, irregular, dark gray-green specimen with dull to slightly glassy luster and possible rough fracture; hardness, cleavage, and specific gravity cannot be reliably determined from the image.

Formation & geological history

May be a fragment of basalt, serpentinite, slag-like material, or a dark mineral such as amphibole; formation age and process are undetermined without examination.

Uses & applications

No reliable commercial use can be assigned; similar materials may be used as aggregate, building stone, or ornamental specimens.

Geological facts

The greenish-black coloration could indicate iron- and magnesium-rich minerals, but lighting and surface coating strongly affect apparent color.

Field identification & locations

Field identification requires a fresh surface, streak test, magnetism test, hardness testing, and ideally density or microscopy. The image alone is insufficient for a species-level identification.