07617 - Beautiful Orthoclase (Feldspar) Crystals from High Atlas Mountains, Morocco Basilosaurus Teeth many of the spines during

many of the spines during the preparation process have been fractured and glued again

It is perfectly preserved

The rostral barbs of this enormous sawfish are relatively common in the Cretaceous quarries in the South of Morocco

we provisionally denote the Polish and Maastricht specimens as “ Mosasaurus ( Leiodon ) cfr

07617 - Beautiful Orthoclase (Feldspar) Crystals from High Atlas Mountains, Morocco Basilosaurus Teeth many of the spines duringOrthoclase, or orthoclase feldspar (endmember formula KAlSi3O8), is an important tectosilicate mineral which forms igneous rock. The name is from the Ancient Greek for "straight fracture," because its two cleavage planes are at right angles to each other. It is a type of potassium feldspar, also known as K feldspar.