Vintage double strand necklace of Chinese knucklebone turquoise sterling vermeil and turquoise fancy box clasp pendant. nlbd1236(e)

A sensational 2 strand necklace of graduated knuckle-bone turquoise beads, individually knotted with a pendant box clasp. The largest bead is 17x14mm and the smallest 9x6 mm. Clasp is gold-wash vermeil silver with granulated decor and is the central pendant. The turquoise is very fine quality and all natural. The inner strand is 18:" Weight is 72 grams and approximately 350 carats of good quality turquoise. Sits perfectly on the neck. The clasp is 5/8" x 1" and stamped SILVER. Circa mid 1900s..