09114 - Top Beautiful 1.89 Inch Pyrite Crystals from famous Navajun Mines (Spain) Asaphus punctatus Paralejurus sp: Fossilworks (Paleobiology Database)

Paralejurus sp: Fossilworks (Paleobiology Database)

Some of them have glued and filled fractures

-Prognathodon solvay (Dollo

These specimens are perfectly preserved in its natural matrix

also known as fool's gold

09114 - Top Beautiful 1.89 Inch Pyrite Crystals from famous Navajun Mines (Spain) Asaphus punctatus Paralejurus sp: Fossilworks (Paleobiology Database)The mineral pyrite, or iron pyrite, also known as fool's gold, is an iron sulfide with the chemical formula FeS2 (iron(II) disulfide). Pyrite is considered the most common of the sulfide minerals. Pyrite's metallic luster and pale brass yellow hue give it a superficial resemblance to gold, hence the well known nickname of fool's gold. The color has also led to the nicknames brass, brazzle, and Brazil, primarily used to refer to pyrite found in coal.