Chalcothallite
A variety of Minerals
What is Chalcothallite?
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Chalcothallite 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.
Quick Facts
Physical Properties
- Color
- Lead Grey to iron black
- Hardness (Mohs)
- 2 - 2.5
- Rock tumbling
- Not recommended
- Density
- 6.74 g/cm³
- Streak
- Black
Chemical Properties
- Chemical Formula
- Tl2(Cu,Fe)6SbS4
- Elements
- Ag, Cu, Fe, K, S, Sb, Tl
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Chalcothallite FAQs
How do I identify Chalcothallite?
Chalcothallite can be identified by its hardness of 2 - 2.5 on the Mohs scale, Lead Grey to iron black color. Look for these key characteristics when examining specimens.
What color is Chalcothallite?
Chalcothallite typically appears in Lead Grey to iron black. Color can vary depending on impurities and formation conditions.
How hard is Chalcothallite?
Chalcothallite has a hardness of 2 - 2.5 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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