Filipstadite
A variety of Ulvöspinel Subgroup
What is Filipstadite?
Filipstadite is a very rare mineral of the spinel group, with the formula (Mn,Mg)(Sb5+0.5Fe3+0.5)O4. It is isometric, although it was previously though to be orthorhombic. When compared to a typical spinel, both the octahedral and tetrahedral sites are split due to cation ordering. Filipstadite is chemically close to melanostibite. The mineral comes from Långban, Sweden, a manganese skarn deposit famous for many rare minerals.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Filipstadite 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.
Filipstadite Localities Map
See where Filipstadite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Key Characteristics
Formation of Filipstadite
In the metamorphic Fe-Mn ore bodies of the Långban-type filipstadite associates with native antimony, calcite, native copper, forsterite, hausmannite, hedyphane, ingersonite, jacobsite, phlogopite, and svabite.
Quick Facts
Physical Properties
- Hardness (Mohs)
- 6 - 6.5
Chemical Properties
- Chemical Formula
- (Fe3+0.5Sb5+0.5)Mn2O4
- Elements
- Fe, Mn, O, Sb
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Filipstadite FAQs
How do I identify Filipstadite?
Filipstadite can be identified by its hardness of 6 - 6.5 on the Mohs scale. Look for these key characteristics when examining specimens.
How hard is Filipstadite?
Filipstadite has a hardness of 6 - 6.5 on the Mohs scale. This gives it moderate hardness.
What is the formation of filipstadite of Filipstadite?
In the metamorphic Fe-Mn ore bodies of the Långban-type filipstadite associates with native antimony, calcite, native copper, forsterite, hausmannite, hedyphane, ingersonite, jacobsite, phlogopite, and svabite.