Diamonds are everywhere: in tiny geometric patterns, in triangles aligned like a ridge, and on the pendant, consisting of two Ceylon sapphires separated by a sumptuous round rose-cut diamond. Scale motifs in lapis lazuli have been cut one by one to fit perfectly with the diamonds. This work is reserved for the most expert lapidaries, as this hard stone is a delicate material to cut. For Cartier, the reverse side must reflect the front, the inner side of the necklace features geometric patterns that evoke the cut of the diamonds on the ridge.