Home > Laskowski Ⅳ – July 13 > MS1869 Marcasite


Marcasite is orthorhombic iron disulfide, having the same formula as pyrite. The mineral name marcasite has roots in Arabic, applying to pyrite, this species, and other metallic minerals, for centuries. Chester (1896) credits German mineralogist Wilhelm Haidinger (1795-1871) with restricting the name marcasite to this particular species in his 1845 Handbuch der bestimmenden Mineralogie.

This is a parallel or nearly parallel grouping of crystallites to perhaps 1 cm, forming a 5 cm individual. Lustrous, nice. From the collection of E.R. Laskowski (1949-2020), a mining engineer who retired to Tucson, Arizona. This specimen was once part of the Forrest Cureton (1932-2020) collection; his label and collection accompany the specimen.

Price: $50

Item code: MS1869

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