Ziesite
A variety of Minerals
What is Ziesite?
Ziesite is a copper vanadate mineral with formula: β-Cu2V2O7. It was discovered in 1980 as monoclinic crystals occurring as volcanic sublimates around fumaroles in the crater of the Izalco Volcano, El Salvador. It is named after Emanuel George Zies (1883–1981), an American geochemist who studied Izalco in the 1930s. Closely related is blossite, also a copper vanadate with formula of α-Cu2V2O7. It forms orthorhombic crystals. Blossite was also first described for specimens from the Izalco volcano. Ziesite and blossite are polymorphs, different crystal structure for the same chemical composition and are quite similar in physical properties. Associated minerals include stoiberite, shcherbinaite, bannermanite, fingerite, mcbirneyite, blossite, chalcocyanite and chalcanthite.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Ziesite 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.
Ziesite Localities Map
See where Ziesite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Black, white in reflected light
- Streak
- Red-brown
Chemical Properties
- Chemical Formula
- β-Cu2(V2O7)
- Elements
- Cu, O, V
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Ziesite FAQs
How do I identify Ziesite?
Ziesite can be identified by its Black color. Look for these key characteristics when examining specimens.
What color is Ziesite?
Ziesite typically appears in Black, white in reflected light. Color can vary depending on impurities and formation conditions.
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