Goldfieldite
A variety of Minerals
What is Goldfieldite?
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Goldfieldite 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.
Goldfieldite Localities Map
See where Goldfieldite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Dark lead-gray
- Hardness (Mohs)
- 3 - 3.5
- Density
- 4.95 g/cm³
Chemical Properties
- Chemical Formula
- (Cu10◻2)Te4S12S Te (tetravalent) may be partially replaced by Sb and/or As (both trivalent). For charge-balance, Cu is then increased (Cu12-x).
- Elements
- Cu, S, Te
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Goldfieldite FAQs
How do I identify Goldfieldite?
Goldfieldite can be identified by its hardness of 3 - 3.5 on the Mohs scale, Dark lead-gray color. Look for these key characteristics when examining specimens.
What color is Goldfieldite?
Goldfieldite typically appears in Dark lead-gray. Color can vary depending on impurities and formation conditions.
How hard is Goldfieldite?
Goldfieldite has a hardness of 3 - 3.5 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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