I found this heart breaker of a beautiful C. chubutensis tooth in a Lee Creek spoils pile in North Carolina. Since it was broken almost exactly in half longitudinally, it offered an interesting interior view of the structure of a fossilized shark tooth. In a process similar to that used in industrial quality control work, I evened out the rough edges and polished the now flat surface to reveal the fossilized core of the tooth and the contrasting enamel.