Exclusively Ours! Crafted of 18k rose gold, Irene Neuwirth Diamond Collection's One-of-a-Kind necklace features a diamond-framed lightning-ridge black opal on a cable chain. 1.27 ct rose-cut white diamonds; lightning ridge black opal. 18k rose gold. 16" chain length, approximately; 30mm pendant drop, approximately. Hook-and-eye clasp with safety latch.