Greetings and thank you for shopping with us. These bracelets are uni-sex, unique and are designed just as pictured. Each piece is designed with one small stone of your choice. The stone is secured for durability. The netal used is copper. Copper is great for blood and energy circulation, may be used as an anti-bacterial and anti-viral. Copper is also believed to assist on reducing carpal tunnel and arthritis in the body. Each Gemstone carries its own properties, Black stones are great for protection and Grounding, pink stones for love, clear quartz for clarity etc. Please contact us with any questions.