4mm Olive Pearl Coated Czech Glass Pearls Strand. These Czech glass pearl beads are perfectly round in shape so they will work with a variety of styles. Whether it's a classic, elegant pearl necklace or a trendy design, you can't go wrong with incorporating these into your projects. Pearl Coating uses the latest technologies of varnishes and pigments, which when applied on a glass core, produce an effect of absolute perfection, optically resembling genuine pearls. Approximately 120 beads per strand.