There are K18 and 0.03 markings. Thank you very much for viewing the product. Please feel free to ask if you have any questions. Thank you. No box included. Since everything is one-of-a-kind, the product may be deleted suddenly. *I also have various other products for sale, and combined shipping is possible, so please take a look. #agete #ete #STAR JEWELRY #dior #ANNA SUI #alice + olivia #H.P. FRANCE #small #rosegold #K10 #k18 #K18 gold #PT #Pt #silver #pink #pendant #cute #stylish #fashionable #stylish #beautiful #pretty #beautiful #diamond #ladies #women #popular #bargain #deals #platinum #silver #simple #necklace #one #white #white gold #pink #yellow #PG #YG #earrings #chain #summer #birthstone #ring #ring #ball #smile #large #actual item #limited quantity #present