Why are fossil shark teeth different colors? The color of fossil shark teeth is a result of the minerals that are present in the surrounding sediments. Teeth fossilize through a process called permineralization. As water seeps through sediments over the teeth, it transports the minerals that are found in the sediment.
Look for Black and Shiny Pieces A lot of people think shark teeth are white which they are when they fall out, but the ones you’re going to find mostly along the shore will be mostly black from fossilization. They’ll also be shiny from the water.