Natural Watermelon Tourmaline Gemstone Necklace. Beautiful earthy natural colors of Tourmaline. 50 gemstones. Colors of pink, green, amber and yellow. This is a great dainty and feminine necklace. The gems are 3mm in size. The necklace length is 18-19". The chain is 14k gold or silver plate and the clasp is 14k gold filled or sterling silver - you choose. Shipping is Free!