Whilst being in the city I noticed that the majority of gelato places had at least one vegan option. However this place had a variety of options and it was the best gelato I had the whole holiday.
It's located on the way to the sanctuary of the Madonna di San Luca walk through the 666 porticoes (if you are walking from the centre of Bologna). So if you are a tourist in the area and are doing that walk - definitely stop in on the way or maybe on the way back once you have walked up all of those stairs!
We enjoyed the ice cream so much we were tempted to have another on our way back to the centre.