Achalaite
A variety of Minerals
What is Achalaite?
Achalaite ((Fe, Mn)(Ti, Fe, Ta)(Nb, Ta)2O8) is a black mineral of the wodginite group, first discovered in 2013. It crystallizes in the monoclinic system and has a dark, metallic luster, a specific gravity of 6.285 and a Mohs hardness of 5.5. Achalaite occurs in the intermediate zone of topaz- and tantalite-bearing pegmatite. Associated minerals include rutile, quartz and albite. Its name comes from the type locality: the Achala batholith in Córdoba, Argentina and the mineral has been approved by the IMA with the acronym 2013-103.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Achalaite 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.
Achalaite Localities Map
See where Achalaite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Black
- Hardness (Mohs)
- 5.5
- Density
- 6.285 g/cm³
- Streak
- Black
Chemical Properties
- Chemical Formula
- (Fe2+,Mn)(Ti,Fe3+,Ta)(Nb,Ta)2O8
- Elements
- Fe, Mn, Nb, O, Ta, Ti
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Achalaite FAQs
How do I identify Achalaite?
Achalaite can be identified by its hardness of 5.5 on the Mohs scale, Black color. Look for these key characteristics when examining specimens.
What color is Achalaite?
Achalaite typically appears in Black. Color can vary depending on impurities and formation conditions.
How hard is Achalaite?
Achalaite has a hardness of 5.5 on the Mohs scale. This gives it moderate hardness.
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