Hemihedrite
A variety of Minerals
What is Hemihedrite?
Hemihedrite is a rare lead zinc chromate silicate mineral with formula Pb10Zn(CrO4)6(SiO4)2(F,OH)2. It forms a series with the copper analogue iranite.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Hemihedrite 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.
Hemihedrite Localities Map
See where Hemihedrite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Key Characteristics
Formation of Hemihedrite
Hemihedrite was first described in 1967 for occurrences in the Florence lead silver mine in the Ripsey District, Tortilla Mountains, Pinal County, Arizona, US. It was named for the hemihedral morphology of its crystals. It occurs in oxidized veins containing galena, sphalerite and pyrite. Associated secondary minerals include cerussite, phoenicochroite, vauquelinite, willemite, wulfenite, galena, sphalerite, pyrite, tennantite and chalcopyrite. It has been reported from several mining districts in Arizona and one in Nevada. It has also been reported from the Antofagasta Region of Chile and the Anarak District of Esfahan Province, Iran.
Quick Facts
Physical Properties
- Color
- Bright orange to henna-brown to nearly black (TL).
- Hardness (Mohs)
- 3
- Density
- 6.42 g/cm³
- Streak
- Saffron yellow (Munsell 5Y 8/10)
Chemical Properties
- Chemical Formula
- Pb10Zn(CrO4)6(SiO4)2(OH)2 IMA formula is outdated; the mineral is OH-dominant.
- Elements
- Cr, H, O, Pb, Si, Zn
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Hemihedrite FAQs
How do I identify Hemihedrite?
Hemihedrite can be identified by its hardness of 3 on the Mohs scale, Bright orange to henna-brown to nearly black (TL). color. Look for these key characteristics when examining specimens.
What color is Hemihedrite?
Hemihedrite typically appears in Bright orange to henna-brown to nearly black (TL).. Color can vary depending on impurities and formation conditions.
How hard is Hemihedrite?
Hemihedrite has a hardness of 3 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
What is the formation of hemihedrite of Hemihedrite?
Hemihedrite was first described in 1967 for occurrences in the Florence lead silver mine in the Ripsey District, Tortilla Mountains, Pinal County, Arizona, US. It was named for the hemihedral morphology of its crystals. It occurs in oxidized veins containing galena, sphalerite and pyrite. Associated secondary minerals include cerussite, phoenicochroite, vauquelinite, willemite, wulfenite, galena, sphalerite, pyrite, tennantite and chalcopyrite. It has been reported from several mining districts in Arizona and one in Nevada. It has also been reported from the Antofagasta Region of Chile and the Anarak District of Esfahan Province, Iran.
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