The oval and pear-shaped Kingman turquoise drops on Irene Neuwirth's earrings are mined from The Mineral Park in the Cerbat Mountains - one of three prehistoric sites in Arizona. Crafted from 18kt gold the slip-through hook has a white diamond micro-pavé bar drop echoed with glittering diamonds at the top of the long pear drop. Wear them with neutral palettes for a statement finish to a special-occasion ensemble.