This ring is a stunning 925 sterling silver ring with a green diopside stone in an emerald shape. It features a halo setting style with zircon stones as secondary stones. The gold overlay adds a touch of elegance to the piece, making it perfect for any occasion. 925 BBJ, ensures high quality and craftsmanship in this beautiful ring, which is a perfect size 7 for any woman's finger. This is in beautiful condition with very minimal wear. I am unsure of the gold overlay as there are no markings to indicate. The underlying metal is 925.