Amazon.com: UNICRAFTALE 24pcs 6 Sizes Stainless Steel Blank Core Ring Settings 6 Sizes Finger Ring Blanks for Inlay Comfort Grooved Finger Ring Round Empty Ring for Jewelry Making
PitterAndGlink: Marbled Polymer Clay Statement Ring
Round Pendant Blanks, Resin Bezel Bases, Mosaic Mountings, Polymer Clay base | eBay