Natural Mixed Stone Stretch Bracelets, with Elastic Fibre Wire, Size: about 2-1/8 inch(55mm) inner diameter, 4~4.5mm thick.âPlease Note: These beads may include Natural Blue Aventurine, Black Silk Stone, Rose Quartz, Agate, Map Stone, Red Aventurine, Chinese Southern Jade, Mahogany Obsidian, Dalmatian Jasper, Petrified Wood and so on(as the picture shows). but as it is a mixed product, the stone type is delivered randomly, please refer to the actual product delivered.