Please read the profile before purchasing. This is a ring with aquamarine (natural tourmaline) and diamonds. The base is platinum 900. I purchased it about 30 years ago at a shop in Osaka Hilton Plaza. I bought it as a new/used item, originally priced at 850,000 yen. Currently, the price of natural tourmaline continues to rise, and it is expected to increase further in the future. The ring size is small, but it is not a full eternity ring, so resizing is likely possible. There is a certificate of authenticity that came with the purchase. It will be provided with the personal information section obscured. Engraving: 9.81 D 011 Pt900 As this is a high-value item, please contact me via the comment section before purchasing. Feel free to ask any questions. I will answer honestly to avoid any trouble. Please purchase only after you are satisfied with the condition and shape of the item based on the photos, product description, and your questions. However, please refrain from commenting if you do not intend to purchase. It takes considerable time and effort to pack and ship the item, and returns are not accepted to prevent swapping and avoid any trouble. Also, since the personal information section of the certificate of authenticity will be removed, returns are strictly refused. Thank you for your understanding. #K and Pt of Long Coat Stone... Aquamarine Stone... Diamond Accessories... Guarantee (certificate)