This ring is new and a variation on the standard Diamond Head Panthere. It is smaller in diameter as it is thinner than the standard ring. Like most of the Panthere Collection has been revised and made smaller for less expensive pieces this is one. This is fully hallmarked Cartier 55 AU 750 DGZ 638. It is stackable as I said it is thinner than most and of course less expensive. This is 4.48mm the Head is 6.29mm it has emerald eyes and an onyx nose. It weights in at 9.20 grams.