18-karat gold Faceted doublet of clear quartz over black shell = 6.70 ct. tw. Bangle bracelet comfortably fits a size 6.5-7.5in wrist It is customary to treat most gemstones to achieve enhanced color and durability. Some of these treatments may not be permanent, and may require special care. Please note: In product titles ct. tw. refers to the total carat weight of all diamonds and/or gemstones combined.