I just finished making a couple of very comfortable bead link necklaces. One is made with 6mm onyx beads and three natural mother of pearl beads also 6mm. The other necklace is made with 8mm carnelian beads. I love the translucency of carnelian. Carnelian is a variety of chalcedony. I love all chalcedony, my very favorite is the apple green crysophrase. That may be my all time favorite stone.