Featured in this lot is this GIA NO HEAT Montana sapphire diamond necklace with GIA and GGA paperwork. The necklace features a polished, stamped, and tested platinum construction and is marked on the underside of the clasp as follows: Sheffield & Sons - PT950. The necklace links are profusely decorated with a total of 30 oval brilliant cut Montana sapphires with dimensions of 9.0 x 5.0mm with type 2 clarity and mulit color coloration with excellent symmetry and a total weight of 42.75cts. The sapphires are GIA certified extremely rare no heat treatment. The links are decorated with a total of 30 round brilliant cut diamonds that shows dimensions of 4.2 x 4mm and shows a clarity of SI1 - I1 and a G - H coloration and a total diamond weight of 8.25ct. The piece comes complete with GGA(GemAssure Gemological Appraisals, GGA Appraisal Number#: GGA050492 and trace number: K28E98) report and appraisal confirming the above info and giving a total value of $168,390.00. GIA (Gemological Institute of America) Sapphire Grading Report#: 1236170180. The collective weight of this necklace is 52.8g. NK015647.