14k gold: It has been used for medicinal purposes since ancient times, including by the Egyptians, Romans, Medieval Europeans, Chinese, and Indians. Gold can help regulate body temperature by relaxing blood vessels and improving blood flow. Some say that wearing gold can enhance mental clarity.
Brass: This metal is a natural antimicrobial and antibacterial, it improves metabolic function and it increases energy. Brass is also known to help in improving digestion and reducing inflammation.