Fingerite
A variety of Minerals
What is Fingerite?
Fingerite is a copper vanadate mineral with formula: β-Cu2V2O5. It was discovered as triclinic crystals occurring as volcanic sublimates around fumaroles in the crater of the Izalco Volcano, El Salvador. Associated minerals include thenardite, euchlorine, stoiberite, shcherbinaite, ziesite, bannermanite, chalcocyanite and chalcanthite. The mineral also dissolves in water. Fingerite is named for Dr. Larry W. Finger (b. 1940) of the Geophysical Laboratory, Carnegie Institution of Washington.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Fingerite 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.
Fingerite Localities Map
See where Fingerite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- black
- Density
- 4.776 g/cm³
- Streak
- dark reddish brown
Chemical Properties
- Chemical Formula
- Cu11(VO4)6O2
- Elements
- Cu, O, V
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Fingerite FAQs
How do I identify Fingerite?
Fingerite can be identified by its black color. Look for these key characteristics when examining specimens.
What color is Fingerite?
Fingerite typically appears in black. Color can vary depending on impurities and formation conditions.
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