According to official website, the vipshop, Chaohongji Fengchai is made of 18K gold inlaid with high-quality natural pearls and rubies. 18K gold refers to gold alloy with 75% gold content, which has high toughness and corrosion resistance and is also a common jewelry material.
Besides the introduction in official website, the material of Chaohongji Fengchai can be confirmed by other ways. For example, it can be identified by a professional jewelry appraisal agency, or consult the customer service of Vipshop for relevant information.