pedrólogo 36
While in a colloquial way you can say 'pedrologist' to the minerologist or geologist (because they "study the stones") , this actually comes from a humorous one where there is supposed to be someone expert in the behavior of an individual named Pedro. Of course, it has nothing to do with stone divination. See -logo ( suffix "scientific study") , litomance, crystallomance, lecanomancy .