I accidentally messed up a nut on one of my guitars so needed to replace it with a new one. I read about different types of nuts, and decided to keep the bone nut like it was originally on the guitar. However after shaping it and putting it on my guitar, I could immediately head and feel the extra resonance compared to the original nut. This is obviously a very high quality nut since the original nut was also bone but nowhere near the same sound. This nut added quite some presence and resonance to the sound of my guitars that I have upgraded the nut on.
The additional good thing is that one nut blank is big enough for making two narrow (fender) type nuts!