21570 - Association Quartz + Pyrite + Barite Crystals - Alnif (Morocco) Gypsum Nicely preserved

Nicely preserved

Preserve two huge teeth

Its size is enormous

Trilobita - Asaphida - Remopleurididae

Schizorhiza

21570 - Association Quartz + Pyrite + Barite Crystals - Alnif (Morocco) Gypsum Nicely preservedQuartz is a mineral composed of silicon and oxygen atoms in a continuous framework of SiO4 siliconoxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar. 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