Guide
Magnetite specimens for sale
61 for sale · $60–$10,000 USD
345 in the gallery
Magnetite is an iron oxide mineral with the chemical formula Fe3O4 that crystallizes in the cubic system. It typically forms octahedral or granular habits with a metallic to submetallic lustre and a black to steel-gray colour. Magnetic properties are a hallmark, and specimens can display strong magnetic attraction, which adds a distinctive feature for field identification and display. Notable specimens come from classic magnetic deposits and coastal lag deposits, with significant collections rooted in localities across the United States, Argentina, Bolivia, China, and Pakistan.
- Formula
- Fe2+Fe3+2O4
- Rarity
- Abundant
- Stability
- Stable
- Collector interest
- Moderate Interest
- Classification notes
- Oxide mineral; Spinel group (AB<sub>2</sub>O<sub>4</sub>) - Strunz 04.DB
Key characteristics
- Crystal system
- isometric
- Mohs hardness
- 5.5–6.5
- Specific gravity
- 5.17–5.18
- Luster
- metallic, submetallic
- Transparency
- opaque
- Color
- black, gray
- Streak
- black
- Cleavage
- none
- Fracture
- uneven, subconchoidal
- Crystal habit
- octahedral, dodecahedral, granular, massive
- Classic / historic
Buy Magnetite specimens
View all 61Where Magnetite is found
Top localities
- Payún Matrú volcano23 specimens
- Tilly Foster Iron Mine17 specimens
- Huanggang Mine8 specimens
- Balmat7 specimens
- Empire State No. 4 Mine7 specimens
- Sapat Gali6 specimens
- Dashkesan Co-Fe deposit5 specimens
- Binn Valley4 specimens
- Cerro de Mercado Mine4 specimens
- SK Star Claim #23 specimens
Guides
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About Magnetite
Collectors prize Magnetite for its historical and practical appeal—well-formed crystals, large tabular or octahedral forms, and streaks of iron luster. It is a durable mineral that often accompanies other iron oxides and sulfides in gangue, and high-quality crystals can exhibit well-defined faces and clean edges. Its magnetic character makes it memorable as a specimen, while its abundance ensures accessible examples for hobbyists and seasoned collectors alike.
