Jalpaite
A variety of Minerals
What is Jalpaite?
Jalpaite is a rare copper silver sulfide mineral with formula Ag3CuS2. It was first described in 1858 for an occurrence in the Leonora Mine, Jalpa, Zacatecas, Mexico and named for the locality. It occurs in low temperature hydrothermal veins at temperatures less than 117 °C (243 °F). Associated minerals include acanthite, mckinstryite, galena, sphalerite, pyrite, chalcopyrite, stromeyerite, polybasite, pearceite, tetrahedrite–tennantite and native silver.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Jalpaite 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.
Jalpaite Localities Map
See where Jalpaite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
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Quick Facts
Physical Properties
- Color
- Gray or dark gray
- Hardness (Mohs)
- 2 - 2.5
- Streak
- Black
Chemical Properties
- Chemical Formula
- Ag3CuS2
- Elements
- Ag, Cu, S
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Jalpaite FAQs
How do I identify Jalpaite?
Jalpaite can be identified by its hardness of 2 - 2.5 on the Mohs scale, Gray or dark gray color. Look for these key characteristics when examining specimens.
What color is Jalpaite?
Jalpaite typically appears in Gray or dark gray. Color can vary depending on impurities and formation conditions.
How hard is Jalpaite?
Jalpaite has a hardness of 2 - 2.5 on the Mohs scale. This makes it a soft mineral that can be scratched easily.
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