These 6mm crystal beads have a .6mm hole with a rounded edge to reduce wear on your stringing material. These crystal glass beads are perfect for dash of color in a necklace design or bracelet project Swarovski's brand of Austrian crystal is famed for its precision shape and brilliant color. Tried and true, the clear Crystal Swarovski Bicones are perfectly faceted and reflect a calm sparkle. Adding these Swarovski Bicone Beads to your next jewelry project creates an unmistakable sign of authenticity and elegance.