Brass is the commonest base metallic used in jewelry building, and is usually employed for plated beads and findings. Brass is a cheap gold substitute, and can even be polished to the shiny shine. It oxidizes with exposure to air and can transform a darker colour for an antique glance. https://pinkbeadedbracelet20741.blogrelation.com/37337802/getting-my-beaded-bracelets-to-work