07635 - Beautiful Orthoclase (Feldspar) Crystals from High Atlas Mountains, Morocco Onchopristis Bones enabling it to breathe while

enabling it to breathe while stalking prey

The eyes facets of this specimen are amazingly well detailed

Miraspidinae

Most of the teeth rests are isolated

In the same matrix another shark tooth of the Odontaspidae family can be seen associated

07635 - Beautiful Orthoclase (Feldspar) Crystals from High Atlas Mountains, Morocco Onchopristis Bones enabling it to breathe whileOrthoclase, 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.