mineral

Pyrite

Iron Sulfide (FeS2)

Hardness: 6-6.5 on Mohs scale. Color: Pale brass-yellow. Luster: Metallic. Crystal structure: Isometric (often cubic or pyritohedral). Cleavage: Poor/Indistinct. Specific gravity: 4.95-5.10.

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

Identified June 28, 2026More mineral →

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Physical properties

Hardness: 6-6.5 on Mohs scale. Color: Pale brass-yellow. Luster: Metallic. Crystal structure: Isometric (often cubic or pyritohedral). Cleavage: Poor/Indistinct. Specific gravity: 4.95-5.10.

Formation & geological history

Forms in a wide variety of geological settings, including hydrothermal veins, as an accessory mineral in igneous rocks, and through biological activity in sedimentary rocks. It is found in rocks of all ages from Archean to Recent.

Uses & applications

Historically used as a source of sulfur and sulfuric acid. Today, it is used in the manufacture of lithium batteries, as a semiconductor material, and as a popular ornamental and collector's gemstone.

Geological facts

Commonly known as 'Fool's Gold' due to its resemblance to real gold. Unlike gold, it is brittle and will spark when struck with steel, a property that led to its use in wheel-lock firearms.

Field identification & locations

Identify in the field by its metallic luster, greenish-black streak (gold has a yellow streak), and brittle nature. It is commonly found in quartz veins and sedimentary coal beds globally.