A modernist sculpture engineered to hold an interchangeable center stone. Form and function in quiet orbit. Each genuine stone sphere nests in the ring’s hollow core and slides onto the finger.  This ring is a size 6.

Each Circa Ring includes one stone sphere, with the option to add more to your collection now or later: Circa Ring Stone Spheres.

Handmade in 925 sterling silver with optional 14K yellow gold plating. Brennan’s 14K gold finish contains 30× more gold than the industry standard. With proper care, it’s designed to last for years—replating is available by request.

Exclusive Ring Spheres for RIRIKU by Brennan Studios include Blue Agate, Carnelian, Rose Quartz and Dalmation Jasper

Sizing: If you are in between sizes, size up.