mineral

Schalenblende

Sphalerite with Wurtzite, Galena, and Marcasite/Pyrite

AI-generated identification · may be incorrect

Banded aggregate of sphalerite, wurtzite, galena, and marcasite/pyrite. Hardness: ~3.5-4 (sphalerite). Color: Brown, yellow, gray, metallic gray-black. Luster: Resinous to metallic. Crystal structure: Colloform, botryoidal banding. Cleavage: Perfect in sphalerite parts. Specific gravity: ~4.0-4.1.

Hardness: ~3
Color: Brown, yellow, gray, metallic gray-black
Luster: Resinous to metallic

Identified August 29, 2026More mineral →

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Physical properties

Formation & geological history

Formed from low-temperature hydrothermal solutions, often in sedimentary environments (Mississippi Valley-type deposits). Frequently found in Poland and Belgium. Age can vary based on deposit, often Paleozoic to Mesozoic.

Uses & applications

Primarily collected as a mineral specimen. When polished, it reveals beautiful concentric banding, making it desirable for lapidary work and collectors. Historically an ore of zinc and lead.

Geological facts

The name 'Schalenblende' is German, translating to 'shell blende', referring to its concentric, shell-like banded structure. It is a classic example of colloidal precipitation from hydrothermal fluids.

Field identification & locations

Identified by its distinctive alternating concentric bands of light/dark brown (sphalerite/wurtzite) and metallic gray (galena/marcasite). Usually found in specific European localities like Olkusz, Poland, or Aachen, Germany. Collectors value well-polished slabs that show the complete banding.