These rings are silver plated with genuine gemstones. Lapis Lazuli, Tigers Eye, Labradorite, Rose Quartz and Amethyst are the gemstone matieral types that are available. The sizes are not true to size using a ring sizer but if purchasing online you can leave a note on the ring Size & shape you'd like and we will try our best to accommodate you or you can visit us in shop to try them on.