This unalloyed metal is Element 41. It is a pure metal that is completely safe for anyone with skin sensitivities. It is non allergenic. It is the only metal used in jewelry to not have any record of reactions on sensitive skins. It is extremely lightweight and 3x harder than Sterling. Anodized into a rainbow of colors that will never tarnish. A great choice for everyone. Unique designs adorned with Swarovski Crystals.