I purchased this here. It's a no-brand, yellow gold ring, 1g, 0.03 carat, maximum width approximately 1.4mm, size 2, a pinky ring. It has "K18" and "0.03" markings on the inside. They are small and difficult to see, please check the photos. One diamond has fallen out, so the carat weight is now 0.01 less. It weighed 1g when the diamond was still attached, so the weight may have decreased slightly due to the missing diamond. I don't have a scale at home, so I don't know the exact weight. It is a genuine 18-karat gold, K18 ring. If you have any questions, please comment before purchasing. Returns and exchanges are not possible to prevent switching, so please only purchase if you understand. The case is not included. Only the ring will be shipped. #18kGold #K18