The diamond band is part of this ring, so if you are already married, this could be THE ring instead of purchasing two rings. Made of 18 kt white gold, the solitaire has a grooved band with a slight wave to it. The "other" ring has nine, two prong set round brilliant cut diamonds in it weighing 0.40 total carats and it also conforms to the slight wavy pattern. A four prong crown will hold a 6.5 mm diamond or gemstone. Size 6.5
This ring is considered a semi-mount, where everything is included but the center has a cubic zirconia as a place holder for visualization purposes, or nothing at all. It is presumed you will be replacing it with a diamond or gemstone.
https://www.americangemsociety.org/4cs-of-diamonds
This item is rhodium plated, a member of the platinum family.