Alexandrite is a precious colored gemstone that exhibits a phenomenon called color change and is one of the rare stones from the chrysoberyl family. Alexandrite is a precious colored gemstone that exhibits a phenomenon called color change and is one of the rare stones from the chrysoberyl family. It has been used in jewelry making for centuries. Jewelers use it to make rings, necklaces, bracelets, earrings, pendants, and other pieces. If you want to own a piece of jewelry that is unique and beautiful, then you can check out GemsNY’s unique collection of Alexandrite jewelry.