Quantum Quatro Silica is a mixed crystal stone composed of chrysocolla, shattuckite, quartz, malachite, and others. The name "Quatro" comes from the word "four," so it implies four types of minerals. However, basically, the copper minerals that grow in copper ore deposits, such as those mentioned above, coexist in a complex and intertwined manner in close proximity. There is a high possibility that cuprite and azurite are also present, including inside the beads. In other words, it's not strictly four types; some beads may contain only two, while others may have as many as six. Please consider this when making your purchase. To confirm the exact composition, a destructive analysis would be required, which we will not perform. Enjoy this easy-to-wear 6-6.2mm size bracelet. (Number of beads) 30 (Bead size) 6-6.2mm (Wrist size) 16.5cm (Suitable for slender men) (Shipping method) We will ship via Mercari with tracking. We will pack it with air cell mat and ship it promptly. If you have any questions, please leave a comment, and we will respond. However, we will reply late at night on weekdays (Monday to Friday) due to work. Thank you for your understanding. ・Natural stone ・Power stone #MorinoIshiyaSanChrysocolla ← By stone #MorinoIshiyaSanBrace ← By item #MorinoIshiyaSanBlue ← By color #MorinoIshiyaSan ← All products