These Cabochon Glass Round 18mm coral pink stones are made by D.S and Co (i.e., vintage Swarovski) Cabochons are a highly polished, convex shaped, un-faceted smooth surface gem with a flat back for mounting. They can be used in a setting mount to create a brooch, ring, cuff links or centerpiece; use them with a seed bead stitched bezel, wrap them with wire or set them into polymer clay. Cabochons are not beads, and do not have holes.
Glue into an 18mm setting to frame the stone using an epoxy glue. e.g., Araldite. Alternatively set into a polymer clay and bake.
