mineral

Pyrite Nodule

Iron Sulfide (FeS2)

AI-generated identification · may be incorrect

Hardness of 6-6.5 on Mohs scale, brassy yellow to golden-brown metallic color, metallic luster, cubic or amorphous nodular structure, indistinct cleavage, specific gravity of 4.8-5.0

Identified August 7, 2026More mineral →

Explore Pyrite Nodule in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness of 6-6.5 on Mohs scale, brassy yellow to golden-brown metallic color, metallic luster, cubic or amorphous nodular structure, indistinct cleavage, specific gravity of 4.8-5.0

Formation & geological history

Forms in sedimentary environments, often in shales, coal beds, and limestone, through the precipitation of iron and sulfur in reducing environments.

Uses & applications

Commonly collected as a mineral specimen, historically used to strike fire, and occasionally used in jewelry or educational displays.

Geological facts

Often nicknamed 'Fool's Gold' due to its superficial resemblance to real gold, though pyrite is much harder, lighter in weight, and yields a blackish streak.

Field identification & locations

Found worldwide in sedimentary rock formations; identifiable by its metallic brassy luster, high specific gravity, and distinctive cubic crystal habits or rounded nodular forms.