Not Just Another Shark's Tooth Upwards to 25 millions years ago, this particular exceptional tooth comes from a long extinct shark, likely the size of our largest whale. The tooth Carcharodon, Midcene, an age of 18-25 million prior years. Of exceptional size and condition, just about every one of its saw-tooth edges are intact and extremely sharp. The color rich, it has evolved into a beautiful stone, untouched, yet with the appearance of a fine natural polish. Exceptional surface and condition. Big, at over 4 1/4" down its sides x 3 1/4" across.