At the centre of these bursts of delight are a rose quartz crystal, known as the power stone or 'universal crystal' for channelling power, energy and clarity. Product Details  Metal: 925 Sterling Silver with a 22k Gold Plate. Stone: Rose cut Rose Quartz Measurements: Length of Earring 6cm, Width of Earring 3.5cm (widest point). Fastened with post and butterfly.