Diamond Cut alloy wheel finishes are now becoming more and more popular, and for a good reason. There are more and more cars on the road with alloys that have diamond cut finishes.
You can recognise diamond cut finishes by looking for a bare metal effect on the alloy wheel itself. Alloys that are diamond cut are similar in appearance to that of the back of a CD. Upon closer inspection you can also see that there are fine lines in the metal where they have been turned and cut on a lathe.