I got this tooth about 600 mi down in Baja California . It was found in a water running creek. This is very heavy and very hard. It is fossilized to a rock. I believe the reason is not black like most teeth are found in Montana or Utah or Wyoming. Is this one was covered with sand and Ash. The impact zone it's not that far away everything was turned upside down when you look at the cliff sides of the river. What I mean by that closer to the ocean the fossils are underneath the gray layer fossilized and sand. And I believe that's why the colors Sandy Brown. Some people said it was a new not that old. My experience in my life this fossils approximately 60 million years old.