This is a design bracelet made with natural stones. Nylon-coated wire is used. It has an adjuster and can be adjusted. Power stone bracelet Crystal Sodalite Aquamarine I like natural stones, but I am not an expert, so I cannot answer questions about synthetic stones or dyeing. I have listed them as described on the purchase site. I try to take pictures that are close to the actual product, but the color may differ from the actual color. I use overseas products (including natural stones). Please be aware of cracks, inclusions, initial scratches, and scratches. Although I make them carefully, they are not as strong as ready-made products, so please do not pull them strongly. Please purchase with the above in mind. It will be waterproofed and shipped in a tube. Color...Blue系 (Blue-based) Material...Natural stone Bracelet/Bangle...Bracelet