This is a wire-wrapped, fossil shark tooth pendant. It is a lemon shark (Negaprion brevirostris) from the Miocene/Pliocene period (approx. 2.4 to 23 million years old). It was recovered from Florida's famous Bone Valley Formation (Peace River).
Refer to the photo. The black centimeter cube is shown for scale and is not included. You get the pendant shown.