- Material: Mabe pearl and 18K gold - Size: 2cm - Design: Twisted frame design - Engraving: K18 Weight: 3g Thank you for viewing. I purchased this at a Mabe pearl specialty store about 30 years ago when I traveled to Ishigaki Island. I have lost the original case and guarantee card, so they are not included. I believe the price reflects this, but please note that this is a cultured pearl. It appears blue, but it is a black pearl. I have worn it a few times, and I think it is in good condition for a vintage item. This is my personal opinion as the seller. Since it is not new, there may be some minor scratches. Please understand that this is a used item, inspected and stored by a private individual, and purchase it if you agree. The necklace is not included. This is a pendant-only listing, so please be aware of that. Thank you for reading to the end. Thank you very much.