Natural & Synthetic Mixed Stone Chips Stretch Bracelets, Natural Lava Rock Round Beaded Bracelet for Women, Size: about 2-1/8 inch(5.3cm) inner diameter, round bead: 8.5mm, chip: 5~12.5x4~7x2~5mm.âPlease Note: These beads may include Natural Amethyst & Rose Quartz & Quartz Crystal & Red Jasper & Green Aventurine & Synthetic Turquoise & Lapis Lazuli & Citrine(Dyed & Heated).