It is recommended to use it when you put up one's hair. The expression of glass changes depending on the kind of light. ●Pictures 1.in the room 3.under the sun Picture４ The light purple part changes to light blue when you enter the room. (It changes to light purple by the influence of ultraviolet rays.) ●Materials & Specifications Materials: Glass and titanium. Dimensions: Length:58mm Width:10mm Weight:4g(one) The pierced part is made of titanium which is said to be the least likely to cause an allergy. I'll put this jewelry in a special box and send it. So It's the best for a present. ----------------------- ◉This jewelry is sold at other sites at the same time. Therefore, if the product is sold out , I will issue the sign that is sold out immediately, but if you buy it in the time difference, the person who ordered it first will give priority. I kindly ask for your understanding. Please bear in mind that photo may slightly different from actual item in terms of color due to the lighting during photo shooting or the monitor's display. After using it, please wipe it lightly with a cloth and put it in the box.