Magnesioferrite
A variety of Minerals
What is Magnesioferrite?
Magnesioferrite is a magnesium iron oxide mineral, a member of the magnetite series of spinels. Magnesioferrite crystallizes as black metallic octahedral crystals. It is named after its chemical composition of magnesium and ferric iron. The density is 4.6 - 4.7 (average = 4.65), and the diaphaniety is opaque. Occurs as well-formed fine sized crystals or massive and granular. Its hardness is 6-6.5. It has a metallic luster and a dark red streak.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Magnesioferrite before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Magnesioferrite Localities Map
See where Magnesioferrite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Key Characteristics
Formation of Magnesioferrite
It occurs in fumaroles, as a result of combustion metamorphism and coal seam fires, in glass spherules related to meteorite impacts, and as accessory phase in kimberlites and carbonatites. It has been reported from Vesuvius and Stromboli, Italy.
Quick Facts
Physical Properties
- Color
- Black, grey in reflected light.
- Hardness (Mohs)
- 5.5 - 6.5
- Density
- 4.51 g/cm³
- Streak
- Dark red
Chemical Properties
- Chemical Formula
- MgFe3+2O4
- Elements
- Fe, Mg, O
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Magnesioferrite FAQs
How do I identify Magnesioferrite?
Magnesioferrite can be identified by its hardness of 5.5 - 6.5 on the Mohs scale, Black color. Look for these key characteristics when examining specimens.
What color is Magnesioferrite?
Magnesioferrite typically appears in Black, grey in reflected light.. Color can vary depending on impurities and formation conditions.
How hard is Magnesioferrite?
Magnesioferrite has a hardness of 5.5 - 6.5 on the Mohs scale. This gives it moderate hardness.
What is the formation of magnesioferrite of Magnesioferrite?
It occurs in fumaroles, as a result of combustion metamorphism and coal seam fires, in glass spherules related to meteorite impacts, and as accessory phase in kimberlites and carbonatites. It has been reported from Vesuvius and Stromboli, Italy.
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