Czech Fire Polished Beads. Color: Two Tone Opaque White/Amethyst. 4mm Round. 50 Beads. In color Two Tone Opaque White/Amethyst, a combination of Opaque White and clear Amethyst. In Czech Fire Polished beads, the shape called Round is actually more of an oval. Fire Polished beads are glass beads that are faceted by machine. The edges and s...