Never wore Blue Topaz Cushion And Diamond Halo Pendant In 14k Rose Gold, 18 inch, adjustable length, roll chain. The pendant is set with one square cushion cut blue topaz, measuring approximately 7 mm, and 25 round brilliant cut diamonds. Total diamond weight is 0.16cts or greater. The diamond clarity is VS-2 or better. The diamond Color is I or better. The necklace has a certificate as well. Please see pictures.