21569 - Association Quartz + Pyrite + Barite Crystals - Alnif (Morocco) Neuropteris Mosasauridae) from the Maastrichtian of

Mosasauridae) from the Maastrichtian of Angola

It has glued but not restored fracture

is a calcium titanium nesosilicate mineral

A fine rim is observed on the sample

label their crocodile teeth as belonging to the huge crocodile of the Sarcosuchus sp genus -however

21569 - Association Quartz + Pyrite + Barite Crystals - Alnif (Morocco) Neuropteris Mosasauridae) from the Maastrichtian ofQuartz 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