mineral

Carved pyrite frog or toad

Pyrite (iron disulfide, FeS₂), likely a carved massive aggregate

AI-generated identification · may be incorrect

Brassy gray-gold metallic luster, opaque, dense, and commonly granular rather than visibly crystalline; Mohs hardness 6–6.5, specific gravity about 5.0. The dark surface may reflect tarnish, polishing, or lacquer; the frog shape is human-carved.

Identified August 28, 2026More mineral →

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Physical properties

Formation & geological history

Pyrite forms in hydrothermal veins and sedimentary environments, often replacing organic material; deposits range from Precambrian to modern geological ages. This specimen’s exact locality cannot be determined visually.

Uses & applications

Primarily a decorative or collectible carving; pyrite is also mined for sulfur, sulfuric-acid production, and as an iron sulfide by-product, but it is not generally used as a structural stone.

Geological facts

Pyrite is called “fool’s gold,” though its harder, more brittle character and darker streak distinguish it from gold. It can oxidize in humid conditions, producing acidic iron-sulfate crusts and sometimes damaging adjacent materials.

Field identification & locations

Confirm with a streak test on unglazed ceramic (pyrite gives a greenish-black to brown-black streak), hardness, and high density; avoid scratching the carving. Common sources include Peru, Spain, China, Italy, and the United States.