The coloring of the rings is done through a filament change, and the gem is printed seperately, so the model can be printed without an AMS. The gem is designed to snap into the medallion, so you might need to sand the edges of the gem slightly to allow it to snap in properly.

The medallion model can be found in the onshape link below, you can use a boolean mesh difference operation in Bambu Slicer to replace the slot for the center gemstone with something else if you wish. It also contains a variant of the model for inserting a 10 mm round cut gemstone.

https://cad.onshape.com/documents/2329977408a3e05f1fe989ab/w/41462fe13b2fb0249226fd28/e/bb5da5e5affa6fbeb9834d7c?renderMode=0&uiState=66730f06ba8b441ff0aa7ea2