Marcasite — FeS₂, an iron sulfide with pyrite's formula but orthorhombic crystals. Forms in cool, acidic shale and coal.

Pale bronze-yellow, metallic, Mohs 6–6.5.
Swipe for the spin.

Specimen image: AI-generated.
https://apps.apple.com/us/app/rockspin/id6747876962
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Antique 925 Sterling Silver Amethyst and Marcasite Ballerina Cocktail Ring - Click Here cardcoincomic.com/products/ant...

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www.mineralcollection.eu/product/2413...
Marcasite and galena from Gmina Olkusz, Olkusz County, Poland
5.5 cm x 3 cm excl. box
105 gram incl. box
€ 15
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