These beautiful Vintage DS & Co. (Swarovski) rhinestones date from the 1960s-1970s. They are called "Light Siam" and are have a thin metallic coating that makes them aurora borealis rhinestones. AB rhinestones give off an iridescent shine when hit by light. These are 29 SS, or 6.32 mm, are faceted, with silver pointed backs. They come 20 to a pack.