They say the leaves of a shamrock represent faith, hope and love. The overarching lights on the Ha’ Penny bridge inspire the shape of the collets holding a stunning 16 carat shamrock-green cushion-shaped tourmaline. ‘Breathtaking’ barely does it justice. With half a dozen pear-shaped diamonds on each side — and ditto to four brilliant cut diamonds — the band is inspired by the ancient Book of Kells.