Necklace with tanzanites

fancy composition decorated with 4 pcs of oval and pear cut tanzanites, 16 pcs of cultured pearls with a diameter of 6.1 - 3.5 mm and 3 pcs of transitional cut diamonds and 25 pcs of diamond rosettes with a total weight of about 0.70 ct (VS1/G-J), the composition is fastened with a round onyx pendant,
gold pr.0.750, total weight 13.760 g.