Try decanting this next time and don't serve it too cold. It's like a red wine and seems almost tannic. It needs some air to open before you drink it.

Thanks James. This wasn't decanted but we did leave it (along with another Gravner, Radikon, and Lispida which all bear some resemblance) in the glass for some time. There was some talk about decanting ahead of time but for whatever reason we didn't. Gravner is an iconoclast in the best sense of the word, making some of the most expressive and unique whites of Italy.