Here is what I think: the natural (black) truffle essence will dissolve in the oil exactly in the same way its artificial twin does (as you can ready in other comments in this thread the artificial and the natural essences are identical). That's how you make truffle oil at home yourself (if your priority is to make truffle oil, you will thinly slice the truffle before you add oil, if your priority is to preserve the (black) truffle, you will keep it whole).

Anyway it's generally a bad idea to preserve a truffle: if you get your hands on a great truffle you want to consume it as quickly as possible. If the truffle it's not great, when then do not waste your time and money on it... ;-)