I am in Jake's camp. I think it is coco. No reason to suspect it wasn't what it was supposed to be because coco can be that purple upon a fresh turn.
Kingwood without a prefix, usually is referring to Brazilian kingwood. That species is cearensis. The wood pictured for sure is not that, IMO. It could very well be Camatillo, which is often called Mexican kingwood. That species is congestiflora. Some sites incorrectly list Camatillo as cearensis. There are definitely two different rosewood referred to as kingwood. IMO Camatillo should just be called Camatillo and the cearensis kingwood should be called kingwood. I don't know if the kingwood voters were thinking Camatillo or not.