18ct Rose and White Gold Pink Tourmaline Diamond Spiral Necklace. PTT659PT. The Pink Tourmaline collection features the romantic tourmaline gemstone in a range of pale pink to deep rose pink almost red colours. This gorgeous coloured stone is often associated with feelings of passion and love so is the perfect gem to gift someone close to your heart. This striking Tivon Pink Tourmaline necklace is a true statement piece. It boasts a vibrant 2.88ct pink tourmaline stone set in the centre of five white gold and rose gold rings that are embellished by stunning 0.50 carats of brilliant cut diamonds. The pendant is completed by a fluid white gold chain. 18ct Rose Gold, 18ct White Gold, 2.88ct Pink Tourmaline and 0.50ct Brilliant Cut Diamonds.