This 7.5"  bracelet is made with with 8mm stones and follows "the 13 Chakra system of Ancient Egypt" as written by Sonya Roy.      www.sonyaroy.com
 
Smoky Quartz, Carnelian,Citrine, Green Aventurine, Rose Quartz ,Clear Quartz, Sodalite ,Moonstone, Purple Fluorite. Amethyst , Clear Quartz , Onyx,Hematite. The 7.5" stretchable bracelet fits most.  Also comes in 6.5 & 7".