I have a avocado bowl from a blank someone mailed me from Hawaii. Not too difficult to turn, it is mostly a lighter colored wood. Pretty much all fruit trees are worth turning as most have great color variation in them. Not sure if avocado is a fruit but the wood is great to work with, can't speak to orange but would love to try some.
The orange wood I used for smoking some meat when I lived in Texas was very light colored and seemed light in weight, also. Of course that wasn’t likely great wood in bags of orange tree chips & chunks, either.