This is a marine blue moissanite ring. The stone is about 8mm. There are grades for moissanite, but this one is a beautifully sparkling, high-quality stone. The stone alone cost about 10,000 yen. The color will not fade. Moissanite has a high hardness and is scratch-resistant, so you can wear it continuously. The base is silver 925. It is a used item, so there are minor scratches. The surrounding stones are zirconia. The size is size 13. Thank you very much.