Certified Natural Aquamarine Ring 925 Sterling Silver Turquoise Women Jewelry Size 6-10. This is a beautiful top quality 925 sterling silver fashion natural aquamarine gemstone women’s ring for any occasion. Please use size chart image to pick your size. Metal type: 925 Sterling silver. Certificate: Yes, GDTC certification. Side Stone: No Metal stamp: 925, Sterling Shape\pattern: Square Setting Type: Prong Environmental Standard: Allergy free, lead, nickel & cadmium free Item Weight: 1.97g. What do customers say about this ring? Looks like a hundred dollar ring!! No tarnish and no green ring. The stone is very clear. It reflects light back from the facets very well. I think it has a S925 stamp inside the ring, but the stamp is very small and blurry, so hard to confirm. Gorgeous ring, Love it. We appreciate your understanding.