Made in the Czech Republic, the facets of these beads are first cut by machine. Then the surface is polished as they are fed through a red-hot oven. Our AB coated colors have a rainbow-like coating added to the surface of the beads. AB stands for Aurora Borealis and when the light catches an AB bead at a certain angle, the bead will reflect and glow with various colors. Most of our inventory is temporarily strung. Please note that small imperfections will occur as part of the manufacturing process and size, shape and color may vary slightly from lot to lot.