Jet Black Opaque Czech Glass Round Beads 8mm Czech glass round beads available in opaque, translucent, opal, swirl and metallic finishes. 8mm Czech glass rounds are small enough earrings, yet bold enough for necklaces. Ideal as accent beads on necklaces and bracelets and incorporated into seed bead/sculptural jewelry. Beads are packed loose, ready to use. Size and pack specifications: Beads are 8mm in diameter. Approximately 30 beads per pack.