925 sterling silver ring 5.5-6, blue decoration

Bought it at a boutique shop in 2018, but rarely wear it. In very good condition! Not sure what the blue studs are. It may be acrylic. There is a mark showing it’s 925 sterling silver. Diameter is about 16mm, so about 5.5 to 6 in US size. Let me know if you have any questions or need more pictures! Open to offers