What a color! And, what a shame! I've had this for a long time. I thought that I'd see if anyone out there has an interest in it as an example of this color in a 731 Tillotson. It may fall under the Sapphire blues but it looks more cobalt to me. If it is I guess this is an unlisted color for these. This was dug in north eastern PA back in the 1990's by a construction worker. $75.00 shipped.