Zirkelite
A variety of Minerals
What is Zirkelite?
Zirkelite is an oxide mineral with formula: (Ca,Th,Ce)Zr(Ti,Nb)2O7. It occurs as well-formed fine sized isometric crystals. It is a black, brown or yellow mineral with a hardness of 5.5 and a specific gravity of 4.7.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Zirkelite 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.
Zirkelite Localities Map
See where Zirkelite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Key Characteristics
Formation of Zirkelite
Initial discovery was from the Jacupiranga carbonatite, Sao Paulo, Brazil. It is also found in Canada, Kazakhstan, Norway, Russia, South Africa, the United Kingdom, and the United States.
Quick Facts
Physical Properties
- Color
- Black
- Hardness (Mohs)
- 5.5
- Density
- 4.741 g/cm³
- Streak
- Brownish black
Chemical Properties
- Chemical Formula
- (Ti,Ca,Zr)O2-x
- Elements
- Ca, O, Ti, Zr
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Zirkelite FAQs
How do I identify Zirkelite?
Zirkelite 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 Zirkelite?
Zirkelite typically appears in Black. Color can vary depending on impurities and formation conditions.
How hard is Zirkelite?
Zirkelite has a hardness of 5.5 on the Mohs scale. This gives it moderate hardness.
What is the formation of zirkelite of Zirkelite?
Initial discovery was from the Jacupiranga carbonatite, Sao Paulo, Brazil. It is also found in Canada, Kazakhstan, Norway, Russia, South Africa, the United Kingdom, and the United States.
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