Charles de Viel Castel's grandmother always told him to appreciate the beauty of nature, so when she left him a loose diamond in her will he found a creative way to preserve it. Inspired by that idea, this 'Sprite' necklace is handcrafted from 18-karat gold and adorned with a smooth pebble that's been hand-picked from a beach. The sparkling round-cut diamonds pay tribute to his family heirloom.