Lake Biwa in Japan produced pearls like these regularly for some years, so it is possible that a technique learned from there is being acknowledged by calling these pearls Biwa pearls. You can read more about it in this article.
The pearls in the necklace are V shaped and have a pale peach lustre. The clasp can be worn to one side - or at the back with the hair up, to display it to its best advantage - it most definitely warrants displaying. It is set off by a couple of enamelled beads from Rajasthan and little garnet beads between the pearl sticks.
Mini Tribal Necklace