Fossil shark teeth are an extremely fragile phosphate material. Any
vibration will shatter the entire tooth.
Coating it in superglue and using a true running diamond blade with
coolant- might work on a great white size tooth. Acetone to take the
superglue off. A small tooth- no way.
My advice is to not ever touch the shiny material with- anything.
Having done museum fossil prep & lapidary- stone is nothing like
metal. Trying to use a jewelers saw will be a futile. Destruction of
Brontotheroocity Stone Cutting on Etsy