Home > Laskowski Ⅹ – April 6 > MS2017 Marcasite


Marcasite is iron disulfide, a polymorph of pyrite. The mineral name marcasite has roots in Arabic, and applied to pyrite, this mineral, and other metallic minerals for centuries. German mineralogist Wilhelm Haidinger (1795-1871) restricted the name marcasite to this particular species in his 1845 Handbuch der bestimmenden Mineralogie.

Marcasite forms rhombic crystals to 1.1 cm on edge in elongated stellate groups. An attractive sample. From the collection of E.R. Laskowski (1949-2020), a mining engineer who retired to Tucson, Arizona. Marcasite is rather susceptible to degradation if stored in a humid environment. Laskowksi purchased this example in 2011 and it remains intact after storage for 11+ years.

Price: $100

Item code: MS2017

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