Stromeyerite
A variety of Minerals

What is Stromeyerite?
Stromeyerite is a sulfide mineral of copper and silver, with the chemical formula AgCuS. It forms opaque blue grey to dark blue orthorhombic crystals. It was discovered in 1832 in Central Bohemia Region, Czech Republic, and named after the German chemist, Friedrich Stromeyer who performed the first analysis of the mineral.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Stromeyerite 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.
Stromeyerite Localities Map
See where Stromeyerite 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
- Blue gray, dark blue, dark steel gray, or steel gray
- Hardness (Mohs)
- 2.5 - 3
- Density
- 6.33 g/cm³
- Streak
- Steel gray
Chemical Properties
- Chemical Formula
- AgCuS
- Elements
- Ag, Cu, S
Also Known As

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Stromeyerite FAQs
How do I identify Stromeyerite?
Stromeyerite can be identified by its hardness of 2.5 - 3 on the Mohs scale, Blue gray color. Look for these key characteristics when examining specimens.
What color is Stromeyerite?
Stromeyerite typically appears in Blue gray, dark blue, dark steel gray, or steel gray. Color can vary depending on impurities and formation conditions.
How hard is Stromeyerite?
Stromeyerite has a hardness of 2.5 - 3 on the Mohs scale. This makes it a soft mineral that can be scratched easily.


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