After a tremendous amount of research and study (I'm talking about a few weeks here) I've found that the cloak was in fact a thick, woolly velvet, embossed with a pattern and lined with fur, the outside being a deep burgundy and the inside black, with the fur along the edges. Technically I would need to add fur along the edge from the clasps down to the hem, but unless I find a suitable looking match in 1:6 scale, I won't worry about it. The cloak is bulky as is, so it doesn't need me throwing more stuff on it to add to that. Besides, at this size the velvet looks furry enough as it is.