mineral

Pyrite Nodule

Iron Sulfide (FeS2)

AI-generated identification · may be incorrect

Hardness: 6-6.5 on Mohs scale. Color: Pale brass-yellow. Luster: Metallic. Crystal system: Isometric. Streak: Greenish-black to brownish-black. Specific gravity: 4.8-5.0.

Hardness: 6-6
Color: Pale brass-yellow
Luster: Metallic

Identified July 29, 2026More mineral →

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Physical properties

Hardness: 6-6.5 on Mohs scale. Color: Pale brass-yellow. Luster: Metallic. Crystal system: Isometric. Streak: Greenish-black to brownish-black. Specific gravity: 4.8-5.0.

Formation & geological history

Formed in sedimentary rocks, hydrothermal veins, and metamorphic rocks through the precipitation of iron and sulfur under reducing conditions.

Uses & applications

Used in the extraction of sulfur and sulfuric acid, historically used for fire-starting, and popular among mineral collectors.

Geological facts

Known commonly as 'Fool's Gold' due to its metallic luster and pale yellow hue which has often deceived inexperienced prospectors.

Field identification & locations

Easily identified by its brassy yellow color, high specific gravity, metallic luster, and hardness that scratches glass. Found worldwide in sedimentary deposits and ore veins.