Welcome to the raw gemstone stud collection. All of these stones are roughly 8mm with the exception of Moonstone which comes in a smaller 6mm size and the regular 8mm size. Raw gemstone chunks are attached to surgical stainless posts with UV resin for longevity. Send me a message with any questions you have 🙂 Follow me on social media for shop updates @earthandelmjewelry Materials: Moonstone, Smoky Quartz, Quartz, Amethyst, Lapis Lazuli, Malachite, Amazonite, Rose Quartz, Garnet, Carnelian, Citrine, Stainless Steel.