All of my Lampwork Cabs are made from my own Lampwork beads......split, slumped and fully annealed in my kiln. Note that some cabs may have a slight indent on the bottom from the mandrel. It doesn't effect it's beauty or usefullness, so no worries, folks!! :) Perfect to use in all beading and jewelry making projects!! Please note that there are only one of each of my lampwork cabochons available; each is a one of a kind!