K18 ruby & diamond necklace. Brand new, unused. Retail price: 138,000 yen Chain material: K18 yellow gold Chain type: Kihei (flat link) Length: Approximately 40cm Top material: K18 yellow gold One oval-cut ruby, approximately 5mm long, 4mm wide 11 diamonds, total 0.16ct Size: Approximately 15mm long (from the bail), 8mm wide Weight: Approximately 3.16g This is a K18 ruby necklace. Diamonds are set around an oval-cut ruby.