This prehistoric shark went extinct along with the great dinosaurs 65 million years ago when a giant asteroid slammed into the planet earth, causing the K-T extinction. Fossil records show that the Lamna Obliquata had small sharp cuspids on the sides of its long razor edged incisor teeth. The small cuspids were used to finish and make clean the severing of skin, flesh, tendons and cartilage, started by its large incisor tooth. Since these 30 foot sharks were powerfully fast swimmers, they would overtake their prey crippling it and rendering it immobile only to come back and finish off the job!!! These menacing looking teeth come in four sizes with a certificate of authenticity giving it's age in approximate millions of years, species, continent of origin, period of existence, rarity and the precious metal (14kt gold or sterling silver), you ordered the fossilized shark tooth pendant crafted in.