Acacia honey is made from the flowers of the acacia (aka locust) tree. It is very light colored, and it is reputed to never crystallize. Certainly none of the acacia honey I've had in the house has crystallized, but I don't know about the "never" part, because we tend to consume it before eternity sets in. :)
My question is, is this due to some property of acacia nectar (if so, what?), or is "acacia honey" a code name for some highly-processed honey-flavored concoction, or ...?