Originally named as they were cultured in the Biwa Lake in Japan. Appropriate shaped nucleus from natural shell material (mother of pearl) is used instead of a bead.
Sold as temporary strung 38-40cm 15 inches (approx) strands.PLEASE NOTE: The beading hole sizes for pearls is traditionally much smaller than for gemstone/semiprecious beads as the most popular traditional stringing method is to use silk thread. Holes are approx. between 0.3-0.5mm.