Dufrénite
A variety of Minerals
What is Dufrénite?
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Dufrénite 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.
Dufrénite Localities Map
See where Dufrénite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Dark green, olive-green, olive-brown, black; olive-brown to reddish brown with oxidation; bluish green to reddish brown or yellow in transmitted light.
- Hardness (Mohs)
- 3.5 - 4.5
- Density
- 3.41 g/cm³
- Streak
- Green
Chemical Properties
- Chemical Formula
- Ca0.5Fe2+Fe3+5(PO4)4(OH)6 · 2H2O
- Elements
- Ca, Fe, H, O, P
Also Known As
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Dufrénite FAQs
How do I identify Dufrénite?
Dufrénite can be identified by its hardness of 3.5 - 4.5 on the Mohs scale, Dark green color. Look for these key characteristics when examining specimens.
What color is Dufrénite?
Dufrénite typically appears in Dark green, olive-green, olive-brown, black; olive-brown to reddish brown with oxidation; bluish green to reddish brown or yellow in transmitted light.. Color can vary depending on impurities and formation conditions.
How hard is Dufrénite?
Dufrénite has a hardness of 3.5 - 4.5 on the Mohs scale. This gives it moderate hardness.
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