This 3-stack silver and gold round densa ringstack is made up of three rings including 1 thick (4mm) silver with a flush set 1.5mm diamond, 1 thick two-toned silver and yellow gold, and 1 thin yellow gold. This ring is available in sizes 5.0 - 11.5, including half sizes. Special note: Because of the width of the stack ring set, it is recommended to buy a stack that is approximately a half to a full size larger than your normal ring size.Materials: 14k gold or rose gold-fill (14k gold over brass core/no nickel), sterling silver (.925) and a lab-created diamond. The 1.5mm diamond is approximately 0.015 carats.. All materials are hypoallergenic. This ring set is designed in San Francisco and handmade in our Upstate New York production studio.