In a lot of my candle holder designs, I use facet strips to form a frame around beautiful fancy colored glass pieces.In this example, it's the other way around - here, colored glass strips form a frame around the facets. The facets appear more like windows in the background glass.
In this example, I used multi-level cut facets. This multi-level cut refracts the light particularly well. Multiple faceted glass stones go particularly well with this design.