Those look to be the earliest Chinese freshwater pearls, known as rice krispie pearls, from the late 70's. They have fabulous orient- that iridescence that plays on the surface- and they are a lot of fun to wear. Alas,they aren't very valuable. If the gold balls are also real gold, they, and the clasp, are worth far more than the pearls. I can buy a strand with no clasp like that today, at Jay's Indian Arts, in Tucson, for about $4.00, well, maybe $6.00. In a second hand store from time to time, for about the same. With no gold. That necklace must have been made when these were the only freshwater pearls in play. When rounder smoother pearls became technically possible, these gradually become no longer grown, though crafts places like Jay's and bead stores still carry some