This set is truly out of this world!!! Featuring different gemstones and high-quality glass beads for each of the planets in our solar system, along with high-quality metal components. Mercury- Larvikite Venus- Top-quality Amber-Colored Crackle Glass Beads Earth- Lapis Lazuli & Chrysocolla Mars- Carnelian Jupiter- Dyed Striped Agate Saturn- Tigerskin Jasper (Saturn's rings are 24K gold-plated brass) Uranus- Dyed Aqua Quartz Neptune- Sodalite Asteroids- Lavastone-plated beads The sun links in the necklace and bracelet are 24K Gold-plated brass, the galaxy-shaped pendant is 18K Gold-plated stainless steel, and the leverback ear wires are 24K Gold-plated stainless steel. All metal components are Nickel-free.