Color...Gold Material...K18 (18 karat) There is a hallmark, although it's difficult to see in the photos. Decoration...Diamond, Brown Diamond...0.3ct Length...40cm (including adjuster) There are slight scratches on the clasp. Otherwise, it's clean. The chain is neither too thin nor too thick, just the right size. The diamonds are also the perfect size for everyday wear and are not ostentatious. The diamonds cannot be removed.