Our Planet jewelry kit contains glass. It can be made of high-quality glass, crystal clear, showing the exquisite internal structure of the planet, enhancing the visual impact. How to use it is simple: 1. Open a gift every day to get surprise jewelry and start counting down the fun. 2. You are free to mix and match to form your favorite jewelry; 3. The length of the necklace can be adjusted freely. When used in a circle, it can be worn as a necklace; When used in two circles, it can be worn as a bracelet. Necklaces, pendants and keychains can be freely combined to create personalized accessories to meet the needs of different styles.