This is a necklace that came out during the disposal of personal belongings. The clasp of the pearl necklace is stamped with K18. The rest is silver. However, since it is an item from a deceased person, I do not know the details of the materials, so I will list it as imitation. I will sell it to someone who will cherish it. The case is not included. Please note that we do not accept any claims, refunds, or cancellations after purchase. We are looking forward to your purchase. Thank you.