Miyuki 8/0 Seed Beads - Picasso Opaque Cobalt 8-4518. Miyuki seed beads are known for their uniformity and quality that give you better accuracy in beading designs. These glass rocaille beads are made out of Japanese glass and come packaged in tubes for easy storage and organization. There are limitless stringing, stitching and bead weaving projects awaiting with our large selection of colors, hues and finishes. Miyuki 8/0 seed beads come in 14g tubes containing approximately 500 beads.