22204 - Galena Crystals + Quartz Crystals + Pyrite in Natural Matrix Plesiosaur teeth and the stone has ornamental

and the stone has ornamental and lapidary uses

Beautiful association that contains a specimen of the genus Crotalocephalina and a specimen of the genus Reedops

Basic information Name: Northwest Africa 869

Otarion isoplates

22204 - Galena Crystals + Quartz Crystals + Pyrite in Natural Matrix Plesiosaur teeth and the stone has ornamentalQuartz 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