Beudantite
A variety of Minerals
What is Beudantite?
Beudandite is a secondary mineral occurring in the oxidized zones of polymetallic deposits. It is a lead, iron, arsenate, sulfate with endmember formula: PbFe3(OH)6SO4AsO4. Beudantite is in a subgroup of the alunite group. It is the arsenate analogue of the phosphate corkite. Beudantite also forms a solid-solution with segnitite and plumbojarosite. It crystallizes in the trigonal crystal system and shows a variety of crystal habits including tabular, acute rhombohedral, pseudo-cubic and pseudo-cuboctahedral. It occurs in association with carminite, scorodite, mimetite, dussertite, arseniosiderite, pharmacosiderite, olivenite, bayldonite, duftite, anglesite, cerussite and azurite.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Beudantite 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.
Beudantite Localities Map
See where Beudantite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Black, dark green, brown, dark yellow, red, greenish yellow, brown
- Hardness (Mohs)
- 3.5 - 4.5
- Density
- 4.49 g/cm³
- Streak
- Grayish yellow to green
Chemical Properties
- Chemical Formula
- PbFe3(AsO4)(SO4)(OH)6
- Elements
- As, Fe, H, O, Pb, S
Also Known As
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Beudantite FAQs
How do I identify Beudantite?
Beudantite can be identified by its hardness of 3.5 - 4.5 on the Mohs scale, Black color. Look for these key characteristics when examining specimens.
What color is Beudantite?
Beudantite typically appears in Black, dark green, brown, dark yellow, red, greenish yellow, brown. Color can vary depending on impurities and formation conditions.
How hard is Beudantite?
Beudantite has a hardness of 3.5 - 4.5 on the Mohs scale. This gives it moderate hardness.
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