Sunflowers are made of 18K gold. Shangyanghua is designed by Lv Huahua Jewelry Design Office and made of 18K gold. Description of Shanghai Flower Material: The precious metal is 18k gold, including 18k gold drawable adjustable chain. The main stone is inlaid with rubies, ranging from 0.4 carats to 0.5 carats, and the diamonds are cut, which is completely counterproductive.