Cylindrite
A variety of Minerals
What is Cylindrite?
Cylindrite is a sulfosalt mineral containing tin, lead, antimony and iron with formula: Pb3Sn4FeSb2S14. It forms triclinic pinacoidal crystals which often occur as tubes or cylinders which are in fact rolled sheets. It has a black to lead grey metallic colour with a Mohs hardness of 2 to 3 and a specific gravity of 5.4. It was first discovered in the Santa Cruz mine, Oruro Department, Bolivia in 1893. The name arises from its curious cylindrical crystal which it forms almost uniquely among minerals.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Cylindrite 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.
Cylindrite Localities Map
See where Cylindrite 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
- Grey-black
- Hardness (Mohs)
- 2.5
- Density
- 5.443 g/cm³
- Streak
- Black
Chemical Properties
- Chemical Formula
- Pb3Sn4FeSb2S14
- Elements
- Fe, Pb, S, Sb, Sn
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Cylindrite FAQs
How do I identify Cylindrite?
Cylindrite can be identified by its hardness of 2.5 on the Mohs scale, Grey-black color. Look for these key characteristics when examining specimens.
What color is Cylindrite?
Cylindrite typically appears in Grey-black. Color can vary depending on impurities and formation conditions.
How hard is Cylindrite?
Cylindrite has a hardness of 2.5 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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