Bismutotantalite
A variety of Minerals
What is Bismutotantalite?
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Bismutotantalite 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.
Bismutotantalite Localities Map
See where Bismutotantalite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Light brown to pitch-black, light smoke-grey to colourless in transmitted light
- Hardness (Mohs)
- 5 - 5.5
- Density
- 8.9 g/cm³
- Streak
- Yellow, yellow-brown to black
Chemical Properties
- Chemical Formula
- Bi(Ta,Nb)O4
- Elements
- Bi, O, Ta
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Bismutotantalite FAQs
How do I identify Bismutotantalite?
Bismutotantalite can be identified by its hardness of 5 - 5.5 on the Mohs scale, Light brown to pitch-black color. Look for these key characteristics when examining specimens.
What color is Bismutotantalite?
Bismutotantalite typically appears in Light brown to pitch-black, light smoke-grey to colourless in transmitted light. Color can vary depending on impurities and formation conditions.
How hard is Bismutotantalite?
Bismutotantalite has a hardness of 5 - 5.5 on the Mohs scale. This gives it moderate hardness.
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