Stromeyerite

A variety of Minerals

Stromeyerite specimen

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.

Applies to all rocks & minerals.

Stromeyerite Localities Map

See where Stromeyerite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.

Map preview
North ZoneCentral RidgeSouth Basin

Interactive map layers and collecting notes are available in the app.

More Images

Stromeyerite specimen
Robert M. Lavinsky

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

StromeyeriteCypargyrite
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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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