No. 4 Rare Mineral ☆ Gem Silica Bracelet ☆ 10.2mm Thank you for always viewing! We would like to introduce the product. This is a Gem Silica bracelet. Gem Silica is a rare mineral formed when quartz permeates chrysocolla and silicifies. The mineral name is "Silicified Chrysocolla." It is a rare mineral in which chrysocolla has been silicified. It is a very rare mineral that is only produced in limited areas such as Arizona, USA, and Peru. The green part is expressed as "forest-like green" The blue part is expressed as "sea-like blue." The size is 10.2mm The wrist size is 17cm. Thank you very much.