Use these 6mm cat's eye round bead in dark grey to accent other bright colors in a jewelry design or with dark earth tones. Their 6mm size is ideal for necklaces and bracelets, so explore the possibilities waiting for your next design! These cat's eye beads, or fiber optic beads, feature a bright band of light that shines across the center, resembling a cat's eye. Try mixing these beads with textured snowflake obsidian gemstones finished with silver components for a cool grayscale necklace. These beads are sold on 16-inch strands.