Marie Mas’s interchangeable 18kt rose-gold Swinging Line earrings are inspired by the moving sculptures of kinetic artists Theo Jansen and Yaacov Agam. Handcrafted in India, they display gradient purple amethysts and rose quartz that can be flipped over to reveal blue topaz and precious stones. Style them as the sole accessory to an elegant dinner edit and watch them sparkle as they catch the light.