This is an engagement ring from STAR JEWELRY. Purchased in 2015 and worn a few times. There is no certificate of authenticity. ◉ Material: Platinum, Diamond ◉ Size: Approximately size 11 (Inner diameter measured by hand, between 16mm and 17mm) ◉ Pt950 ◉ Diamond: 0.295 carats ◉ Engraving inside the ring: "Male Name to Female Initial" ◉ The name is also written on the original box in English. Please consider it as a bonus. (If you don't need the box, I will discount it by 500 yen, so please comment.)