Are you looking for more color with different gemstones, or even an unusual eternity band.
Right now it's trending towards using gemstones for a wedding or anniverary band. You get a major lux look that's totally unique and versatile enough to build a power ring stack, without the big price of diamonds. Shop Arthur's Stackable Rings
Birthstone Wedding and Anniversary Bands: Stackable Rings
Shop Tacori Rainbow Rings