Hausmannite
A variety of Spinel Subgroup
What is Hausmannite?
Hausmannite is rich in magnesium and occasionally appears as a genuinely captivating gemstone. When processed through Ferro manganese refining, it creates a dark brown color for pavers and bricks. In nuclear applications, hausmannite is used to promote proton travel, but only when dissolved in water. Specimens are highly collectible and range wildly in price.
Etymology & Origins
Wilhelm Haidinger (1827) named it in honour of Johann Friedrich Ludwig Hausmann (1782–1859), Professor of Mineralogy, University of Göttingen, Germany.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Hausmannite 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.
Hausmannite Localities Map
See where Hausmannite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
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Quick Facts
Physical Properties
- Color
- Brown-black
- Hardness (Mohs)
- 5.5
- Density
- 4.84 g/cm³
- Streak
- Dark reddish brown, dark brown
- Luster
- Resinous, Dull, Sub-metallic
- Crystal System
- Tetragonal
Chemical Properties
- Chemical Formula
- Mn2+Mn3+2O4
- Elements
- Mn, O
Also Known As
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Hausmannite FAQs
How do I identify Hausmannite?
Hausmannite can be identified by its hardness of 5.5 on the Mohs scale, Brown-black color, Resinous, Dull, Sub-metallic luster, Tetragonal crystal system. Look for these key characteristics when examining specimens.
What color is Hausmannite?
Hausmannite typically appears in Brown-black. Color can vary depending on impurities and formation conditions.
How hard is Hausmannite?
Hausmannite has a hardness of 5.5 on the Mohs scale. This gives it moderate hardness.
