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</html><thumbnail_url>https://zemaljskimuzej.ba/app/uploads/2025/02/predmet_minerali_pirit_0-1.jpg</thumbnail_url><thumbnail_width>500</thumbnail_width><thumbnail_height>415</thumbnail_height><description>Pyrite comes in beautiful and regular crystalline forms. With its yellow colour and metallic sheen, it is reminiscent of gold. It differs from the precious metals in that it cannot be worked. Also, while gold grinds into yellow dust, ground pyrite is black. In terms of chemical composition, it is an iron sulphide.</description></oembed>
