Magnetite
Magnetite · Mineral Specimen
Crystal System
Cubic (Isometric), massive or octahedral crystal habit
Mineral Group
Oxides
Chemical Formula
Fe2+Fe3+2O4
Formation Process
Igneous, metamorphic, and sedimentary processes; commonly found in magmatic deposits, high-grade metamorphic rocks, and black sand beach placers
About This Crystal
Opaque, dark gray to metallic black mineral specimen with an uneven, rough surface texture and submetallic to metallic luster, showing strong magnetic properties.
Physical Characteristics
Color is dark gray to black, streak is black, cleavage is none (octahedral parting may be present), fracture is uneven to subconchoidal, specific gravity is around 5.17, tenacity is brittle, and it is strongly magnetic.
Optical Properties
Opaque, isotropic, metallic luster showing no birefringence or pleochroism.
Hardness & Durability
Origin Region
Worldwide, notable deposits in Sweden, Norway, USA (Adirondacks), Russia, and South Africa
Hardness & Durability
Mohs hardness of 5.5 to 6.5, brittle toughness, stable under normal environmental conditions, but can rust if exposed to moisture over long periods due to iron content.
Care & Maintenance
Keep dry to prevent oxidation and rusting of iron content; clean with a soft dry cloth or gentle warm soapy water, ensuring thorough drying afterwards.
Rarity & Value
Common mineral, but high-quality crystalline specimens or massive lodestones can command moderate collector value; generally affordable.
Special Characteristics
Strong natural magnetism; some specimens act as natural magnets known as lodestones.
Lore & History
Historically known as lodestone, used in ancient times as an early form of compass for navigation; in modern metaphysical practices, it is associated with grounding, attracting abundance, and aligning the chakras.