Yes, that's right. You need to look at size, shape, color, height etc to be sure. Basing an ID for an iris just on a picture is, unfortunately, not always enough.
Find a vendor who sells it or find someone who owns it and test out the theory. I have Loreley but I don't have enough to share yet. Would you be willing to go over and show your picture in the iris forum? There are some folks there who could give a better yes/no than my 90% certainty.
