This special necklace is made of Chrysoprase and rock crystal roundels, green onyx beads and a chrysoprase pendant with a rock crystal design. The necklace is 18 inches long and the round beads are 10mm. The pendant is 1 1/2 inches wide. The beads are all genuine stones and not glass I guarantee this! The brass clasp is so beautiful and big! C. 1925 and in very good condition. Truly a one of a kind piece!