Pyrite
Pyrite · Semi-Precious Gemstone / Mineral Specimen
Crystal System
Cubic (Isometric), often forming cubes, pyritohedrons, and octahedrons; commonly encountered as massive, granular, or nodular aggregates.
Mineral Group
Sulfides
Chemical Formula
FeS2
Formation Process
Hydrothermal veins, sedimentary rocks (such as shales and coal beds), and as an accessory mineral in igneous and metamorphic rocks across a wide range of temperatures.
About This Crystal
The specimen is a beaded bracelet composed of polished, spherical beads exhibiting a metallic luster and a brassy, pale yellow to silvery-gray color, characteristic of iron pyrite.
Physical Characteristics
Brass-yellow to pale brownish-black streak, opaque, metallic luster, conchoidal to uneven fracture, no distinct cleavage, specific gravity of approximately 5.0.
Optical Properties
Opaque with a brilliant metallic luster. Strongly reflective, yellowish-white to brownish under reflected light.
Hardness & Durability
Origin Region
Notable sources include Peru, Spain, Italy, Peru, and the United States. Forms in igneous, metamorphic, and sedimentary environments.
Hardness & Durability
Mohs hardness of 6 to 6.5, brittle tenacity, sensitive to moisture and acids which can cause tarnishing or oxidation.
Care & Maintenance
Keep dry and away from moisture or harsh chemicals to prevent oxidation and tarnishing. Clean gently with a soft dry cloth; avoid water soaking and ultrasonic cleaners.
Rarity & Value
Common mineral worldwide, affordable as polished beads and jewelry, though high-end crystalline specimens command higher prices.
Special Characteristics
Often called 'Fool's Gold' due to its metallic golden sheen; exhibits strong metallic luster and can spark when struck against steel due to high hardness and iron content.
Lore & History
Historically used by ancient civilizations like the Incas and Native Americans for amulets and mirrors. In modern crystal healing, pyrite is associated with abundance, vitality, willpower, and the solar plexus chakra, though these remain traditional beliefs without scientific backing.