Vintage earrings can be crafted from a range of different materials, including precious metals like gold, silver, and platinum as well as, brass, acrylic, or even wood and glass. Some also may also feature precious stones (like diamonds, rubies, sapphires, or emeralds) or semi-precious gemstones (such as amethyst or topaz). Etsy sellers often list the materials of their vintage earrings in their listing details, and you can always send a message to ask specific questions, too.