The GIA lab has the capability but still does not provide nacre thickness because, they say, trheegraerdiisngnnoacurneivtheircskanles'ss.tandard" . This doesn't make sense to me; nacre thickness, in millimeters, does not indicate "good' or "bad" or euen designations of 'thin' or ...
No picture I've seen does the coin justice, especially this version which I think is an AE. Crown of Thorns - I like a lot of different type of coins, but I love the ones that really mean something. This is a work of art at many levels in my book. Blue/Gold Celtic Cross - ...