Bernardite
A variety of Minerals
What is Bernardite?
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Bernardite 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
- Black
- Hardness (Mohs)
- 2
- Rock tumbling
- Not recommended
- Density
- 4.105 g/cm³
- Streak
- Red
Chemical Properties
- Chemical Formula
- TlAs5S8 Some As may be replaced by Sb.
- Elements
- As, S, Tl
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Bernardite FAQs
How do I identify Bernardite?
Bernardite can be identified by its hardness of 2 on the Mohs scale, Black color. Look for these key characteristics when examining specimens.
What color is Bernardite?
Bernardite typically appears in Black. Color can vary depending on impurities and formation conditions.
How hard is Bernardite?
Bernardite has a hardness of 2 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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