07635 - Beautiful Orthoclase (Feldspar) Crystals from High Atlas Mountains, Morocco Onchopristis Bones Enormous Prognathodon tooth

Enormous Prognathodon tooth

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

enabling it to breathe while stalking prey

it seems to be from the incisors of the symphysis

Miraspidinae

07635 - Beautiful Orthoclase (Feldspar) Crystals from High Atlas Mountains, Morocco Onchopristis Bones Enormous Prognathodon toothOrthoclase, 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.