The base metal clasp on this is done in an Art Nouveau style with a design of flowers done in pierced repousse, cultured AA pearls embedded in it and has aged patina and it is in working order. Good thing it is a strong box style clasp as the graduated rock crystal beads are heavy, weighing in at just over 99.90 grams! The beads graduate from 7mm to 12mm. I have just had the whole necklace restrung with hand knotted cord and so it has years of wear in it, plus it looks fresh and pristine, which in a transparent rock crystal necklace is important. The double strands measure on the inside strand 16" and the outside is 18". A thing of beauty is a joy forever. This is an outstanding treasure with Art Nouveau style detailing.