Pyrite
Pyrite · Mineral Specimen
Crystal System
Cubic (Isometric) system, typically forming cubic, pyritohedral, or octahedral crystals, often appearing here in a massive or granular aggregate habit.
Mineral Group
Sulfides
Chemical Formula
FeS2
Formation Process
Forms via hydrothermal veins, sedimentary deposition in reducing environments, and as an accessory mineral in igneous and metamorphic rocks.
About This Crystal
An opaque, metallic mineral specimen displaying a brassy-yellow color often referred to as 'fool's gold'. The surface shows a collection of tiny intergrown crystal faces and a bright metallic luster reflecting light.
Physical Characteristics
Color is pale brass-yellow; streak is greenish-black to brownish-black; cleavage is indistinct; fracture is conchoidal to uneven; specific gravity is approximately 5.0; tenacity is brittle; non-magnetic.
Optical Properties
Opaque with a strong metallic luster. Exhibits no standard refractive indices or transparency due to its metallic nature.
Hardness & Durability
Origin Region
Found globally with notable deposits in Peru, Spain, Italy, and the United States. Forms in sedimentary, igneous, and metamorphic rocks.
Hardness & Durability
Mohs hardness of 6 to 6.5. Brittle tenacity, prone to breaking or crumbling if dropped. Not ideal for delicate jewelry settings.
Care & Maintenance
Keep away from moisture and humidity to prevent oxidation (rusting) and degradation of the mineral. Clean gently with a dry cloth; avoid water and harsh chemicals.
Rarity & Value
Common mineral worldwide. Value depends on specimen aesthetics, crystal size, and perfection. Affordable as a mineral specimen.
Special Characteristics
Famous for its striking metallic brassy color resembling gold, leading to its nickname 'Fool's Gold'. Can spark when struck against steel due to friction.
Lore & History
Historically used by ancient civilizations for striking fire and in decorative items. In modern crystal healing, it is traditionally associated with abundance, vitality, and the solar plexus chakra, though these are cultural beliefs rather than scientific claims.