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 was designed in San Francisco and is handmade in our Upstate New York production studio.