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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.
Pyrite with Galena, from UKACTUAL AS SEEN: The image shows the EXACT specimen you will receive. The specimen has been carefully hand selected and photographed. Measurements are as accurate as possible, though be aware measuring precise dimensions can be difficult from irregular shaped items. Whilst we portray colours as close to life-like as we can, colours will vary if taken in sunlight, indoors, from monitor to monitor and device to device. Once this specimen is sold, we will update this listing with new similar selected item, with a new photo and dimensions.