This is a convenient and stylish item that can be hung around your neck when you take off your glasses. It can also be used as a mask chain or necklace. In that case, please remove the silicone rubber from the lobster clasp. It is made with white glass beads and alexandrite glass beads that change color in the light. The images are of the same item. ◆ Changes with sunlight, LED, and fluorescent light. If you are using it during work, etc., it will blend in with white uniforms and shirts, so it is recommended as it will not stand out. ◆ Silver color. If you wish, gold can be changed‼️ Nylon-coated wire is used, so it is durable and you don't have to worry about it breaking. In sunlight and LED light, it changes to light purple, in fluorescent light to light blue, and in mixed light to a blue-gray color. How about for sunglasses or reading glasses? Hope to have a good relationship with you! ❣️^_^