A diamond and hardstone necklace, set with a rose-cut diamond within an openwork whorl surround, set throughout with brilliant-cut diamonds and containing a simulated turquoise bead, the whole suspended from a cable-link chain, pendant length 24mm, chain length 53.5cm. £600-£800

Retailed by Barney’s, Los Angeles.

According to a PMI test on an XRF Analyzer, the necklace is testing as platinum.