■K18 Synthetic? Opal Ring■Thousand-Thread Filigree (Openwork)■Antique Showa Retro■Ring■Used, Polished Finish■ This is a K18 synthetic? or natural? opal ring, the origin of which is uncertain. I love collecting these retro rings, and finally, I have one to offer!! It has a very lovely color and is highly recommended. The color seems to change slightly depending on the viewing angle, and although I suspect it's a synthetic stone, I'm not entirely sure. While not visible to the naked eye, there are slight chips and scratches on the stone when viewed through a 10x loupe, as it is an antique. This ring was made in the Showa era, and the thousand-thread filigree (openwork) on the base and the claw setting are charming, making the craftsmanship highly recommended. The color seen depending on the angle and lighting is very beautiful, and the captivating color is highly recommended. The stone is not marked with its carat weight, and it appears relatively shiny for its age. Please understand that I have not had it appraised. It has been cleaned and polished to the extent possible, but as it is used, there are minor scratches, marks, dents, and signs of wear, so please understand. I have tried to include these in the photos as much as possible. Marking: K18 Size of the center stone: Approximately 14.4mm long x 11.0mm wide Thickness of the ring base: Approximately 0.8mm Width of the ring base: Approximately 1.6mm Total weight: Approximately 4.53g The ring size is size 12. If you require resizing, please inquire through Q&A. The detailed sizes are shown in the photos taken on graph paper (1mm squares). This is a used item. It has been polished to the extent possible. There are minor scratches, scuffs, and dents. Please refrain from bidding if you are overly sensitive to imperfections. The item for sale is the K18 synthetic? opal ring shown in the first image. There are no accessories. (Management number G-1131) Shipping will be via Rakuraku Mercari (Yamato Transport) Nekopos. Due to thickness restrictions, the packaging will be light. (No gift wrapping, etc.) ★Posted in the mailbox, with tracking★ We are not responsible for any loss, so if you are concerned about the shipping method, we can change it to Takkyubin (home delivery) prepaid or Letter Pack shipping for an additional fee if you let us know before purchasing.