Kobellite
A variety of Minerals
What is Kobellite?
Kobellite is a gray, fibrous, metallic mineral with the chemical formula Pb22Cu4(Bi,Sb)30S69. It is also a sulfide mineral consisting of antimony, bismuth, and lead. It is a member of the izoklakeite - berryite series with silver and iron substituting in the copper site and a varying ratio of bismuth, antimony, and lead. It crystallizes with monoclinic pyramidal crystals. The mineral can be found in ores and deposits of Hvena, Sweden; Ouray, Colorado; and Wake County, North Carolina, US. The mineral was named after Wolfgang Franz von Kobell (1803–1882), a German mineralogist.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Kobellite 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.
Kobellite Localities Map
See where Kobellite 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
- Blackish lead-gray to steel-gray
- Hardness (Mohs)
- 2.5 - 3
- Density
- 6.51 g/cm³
- Streak
- Black
Chemical Properties
- Chemical Formula
- Pb22Cu4(Bi,Sb)30S69 May contain minor Fe replacing Cu.
- Elements
- Bi, Cu, Fe, Pb, S, Sb
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Kobellite FAQs
How do I identify Kobellite?
Kobellite can be identified by its hardness of 2.5 - 3 on the Mohs scale, Blackish lead-gray to steel-gray color. Look for these key characteristics when examining specimens.
What color is Kobellite?
Kobellite typically appears in Blackish lead-gray to steel-gray. Color can vary depending on impurities and formation conditions.
How hard is Kobellite?
Kobellite has a hardness of 2.5 - 3 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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