The Harmonic Coil Ring is made from recycled 18kt pink gold, featuring conflict free champagne diamonds.Part of theHarmonic Collectionby Sandy Leong.Sandy Leongs Harmonic Collection is designed in partnership with world-renowned diamond manufacturer, Rio Tinto. Selected for a second sequential year, Sandy was nominated to create a collection that promotes elevated, sustainable design using ethically sourced diamonds through Rio Tintos acclaimed Diamonds with a Story initiative.