Season: All Season Hallmark: K18 on the clasp Material (Metal): K18 Yellow Gold Material (Stone): Diamond (Carat unknown) / Pink Opal Type of Adjuster: Chain Adjuster Size: Total Length: Approximately 45cm Chain Width: Approximately 1.0mm Top Detachable from Chain: No Top: Approximately W 9.5mm x H 10.5mm Adjuster Can Position (Distance from the metal fitting): Approximately 5.0cm Weight: 5.4g Brand New, Unused No accessories Due to the high value of the item, returns and exchanges are not possible after purchase.