Columbite (mineral group)
Columbite
A variety of Minerals
What is Columbite (mineral group)?
Columbite (mineral group) is a family of dark-colored minerals that are mined as a source of the element Niobium. Niobium is itself an important metal used to strengthen alloys - stainless steel, for instance, usually contains small amounts of Niobium. Certain specialist alloys used in aerospace construction also utilize Niobium.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Columbite (mineral group) 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.
Columbite (mineral group) Localities Map
See where Columbite (mineral group) is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Key Characteristics
Characteristics of Columbite (mineral group)
Columbite contains varying amounts of thorium and uranium, which makes it radioactive to various degrees.
Health & Safety Information
- ⚠️Columbite (mineral group) is toxic due to its Radioactivity.
- ⚠️Columbite (mineral group), which contains thorium and uranium, is radioactive and can exhibit varying levels of radioactivity depending on the concentration of radioactive elements. It's recommended to use a Geiger counter to measure radiation levels before handling, wear a mask to avoid inhaling radioactive dust, and wash hands thoroughly afterward. Store it in a sealed box in a well-ventilated area away from people.
Quick Facts
Physical Properties
- Color
- Black to brownish black
- Hardness (Mohs)
- 6
- Density
- 5.2 - 6.65 g/cm³
- Streak
- Blackish brown
- Luster
- Sub-metallic
- Crystal System
- Orthorhombic
Chemical Properties
- Chemical Formula
- (Fe, Mn)(Nb, Ta)2O6
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Columbite (mineral group) FAQs
How do I identify Columbite (mineral group)?
Columbite (mineral group) can be identified by its hardness of 6 on the Mohs scale, Black to brownish black color, Sub-metallic luster, Orthorhombic crystal system. Look for these key characteristics when examining specimens.
What color is Columbite (mineral group)?
Columbite (mineral group) typically appears in Black to brownish black. Color can vary depending on impurities and formation conditions.
How hard is Columbite (mineral group)?
Columbite (mineral group) has a hardness of 6 on the Mohs scale. This gives it moderate hardness.
What is the characteristics of columbite (mineral group) of Columbite (mineral group)?
Columbite contains varying amounts of thorium and uranium, which makes it radioactive to various degrees.
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