Corkite
A variety of Minerals
What is Corkite?
Corkite is a phosphate mineral in the beudantite subgroup of the alunite group. Corkite is the phosphate analogue of beudantite and with it, a complete solid solution range exists. Corkite will also form a solid solution with kintoreite. Corkite is named after County Cork, Ireland; the location where the first notable amount was discovered in 1869. Like many of the other minerals in the beudantite group, corkite is a relatively uncommon, secondary mineral that occurs in oxidation zones near hydrothermal base metal deposits. It occurs associated with pyromorphite, malachite, plumbojarosite, limonite and quartz.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Corkite 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.
Corkite Localities Map
See where Corkite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Brown to light yellowish brown, pale yellow, yellowish green to dark green
- Hardness (Mohs)
- 3.5 - 4.5
- Density
- 4.31 g/cm³
Chemical Properties
- Chemical Formula
- PbFe3(PO4)(SO4)(OH)6
- Elements
- Fe, H, O, P, Pb, S
Also Known As
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Corkite FAQs
How do I identify Corkite?
Corkite can be identified by its hardness of 3.5 - 4.5 on the Mohs scale, Brown to light yellowish brown color. Look for these key characteristics when examining specimens.
What color is Corkite?
Corkite typically appears in Brown to light yellowish brown, pale yellow, yellowish green to dark green. Color can vary depending on impurities and formation conditions.
How hard is Corkite?
Corkite has a hardness of 3.5 - 4.5 on the Mohs scale. This gives it moderate hardness.
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