- Art-Deco and Tetris inspired - Asymmetrical design with Cubism colour - Handmade in London, United Kingdom - 18ct yellow gold plated silver with topaz, citrine, quartz and enamel Composition: Metal: 100% sterling silver with 18ct yellow gold plating; Gemstones: 40% white topaz, 30% citrine, 30% quartz; Other: 100% enamel Overall Size: 20.0mm x 5.8mm x 2.0mm