The shark's teeth that are found on beaches are actually over 10,000 years old! They become fossilized over all of those years and that turns them from their pearly white color into variations of black, gray, or brown. When the teeth get buried in sediments, they absorb the minerals around them and they change color depending on the color and chemical composition of those minerals.
We find our fossilized shark's teeth on Vilano Beach in Saint Augustine, Florida. This beach is known to be scattered with lots of teeth, and every time you are out there you are sure to see someone else searching too! While our beach is great, there are many other beaches in Florida where these fossils are present. Many people also search inland on the rivers for the coveted Megalodon teeth which are millions of years old and the size of your palm!
While finding fossilized shark's teeth is a fun hobby, we also need to open our eyes to the problems that are happening with these great animals today. Some species of sharks are declining in numbers due to shark finning, overfishing, and bycatch. It is great to educate ourselves on the different types of sharks there are and spread awareness for what is happening to them so then we can save them from extinction!