Marcasite
The mineral Marcasite, sometimes called white Iron Pyrite, is Pyrite and Galena. It is physically and crystallographically distinct from pyrite, which is iron sulfide . Marcasite is lighter and more brittle than pyrite. Specimens of Marcasite often crumble and break up due to the unstable crystal structure.
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Marcasite
(May differ to photo) Sale! £18.76SIZE: 60-80mm (Range)
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Marcasite
(Actual as seen) Sale! £19.75SIZE: 108 x 90 x 49mm
(4.25 x 3.54 x 1.93 inches)
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