The 2-hole GEMDUO (similar to the Diamonduo bead) features a beveled diamond shape with 2 holes located horizontally through the top & bottom points of the diamond. This makes the GEMDUO bead compatible with almost all other 2-hole style Czech glass beads. The GEMDUO has a dimensional top and a flat back, giving the designer two different surfaces to work with. Similarly to the SuperDuo, the GEMDUOS also nestle together to create a textured, mosaic-like pattern. This diamond-shaped Duo bead by MATUBO is a great addition to the SuperDuo & pairs nicely with the pointed facets of crystal Bicone beads as well as small seed beads.