Where is Pyrite with Magnetite found?
FeS2 (Pyrite) with Fe3O4 (Magnetite)
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Open the appPyrite with Magnetite occurs in specific geological environments. Knowing where to look, and in what kind of rock, is the difference between going home empty-handed and finding a great specimen.
Where to find Pyrite with Magnetite
Kola Peninsula, Russia
Known for various iron and sulfide deposits where both minerals can be found.
Kiruna, Sweden
Famous for its large iron ore deposits, primarily magnetite, with associated sulfides including pyrite.
Broken Hill, Australia
A world-class lead-zinc-silver deposit with significant pyrite and magnetite in the metamorphic host rocks.
El Indio, Chile
High-sulfidation epithermal gold deposit where pyrite is abundant, and magnetite can be present in certain alteration zones.
Banded Iron Formations (various global locations)
Ancient sedimentary rocks rich in iron oxides (magnetite, hematite) where pyrite can form diagenetically or during metamorphism.
Collecting tips
- Look for Metallic Luster. Pyrite's distinctive brassy metallic luster is often visible, even in small grains. Magnetite will have a darker, metallic to submetallic luster.
- Test for Magnetism. Magnetite is strongly magnetic and will attract a common magnet. This is a key diagnostic feature to distinguish it from other black minerals.
- Observe Crystal Habits. Pyrite often forms well-developed cubes, pyritohedrons, or octahedrons. Magnetite can also form octahedrons or appear as granular masses.
- Check Streak Color. Pyrite has a greenish-black streak. Magnetite has a black streak. This can help differentiate them if they are finely intergrown.
- Consider Geological Context. Their co-occurrence is common in ore deposits (e.g., skarns, hydrothermal veins, BIFs) and metamorphic terrains. Understanding the local geology can guide your search.
Quick Check
- Color:
- Brassy yellow (Pyrite) and Black (Magnetite)
- Luster:
- Metallic (Pyrite) and Metallic to Submetallic (Magnetite)
- Streak:
- Greenish-black (Pyrite) and Black (Magnetite)
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