This is a K18 ring with a 3.01 carat diamond, ordered from Mitsukoshi. The ring features a beautiful array of well-matched, colorless, and highly transparent diamonds. A 3-carat diamond ring has a significant presence. This ring was quite expensive. The photos taken with a smartphone may appear a bit white, but the actual diamonds are high-quality and have a strong brilliance. The weight is 5.9g. It's a very gorgeous ring. The size is approximately 12-13. Stamped K18 3.01 My tastes have changed, and I don't think I'll wear it in the future, so I'm offering it at a bargain price. I received an appraisal certificate and identification report at the time of purchase, but they are at my parents' house. It will take some time to find them... The sale includes only the ring and the case.