Definitely one of the most unusual colors I’ve ever seen in the Mosser Glass collies – this one is Plum Opal Slag – plum and slag glass with opalescence on the face, feet and tail. The effect is a deep plum with pinkish-white on the head, ears, toes and tail. It’s pretty but difficult to find the right lighting to make it look its best. This photo at least does it justice.