This is a gorgeous piece of Australian opal weighing in at 15.4 carats. It is topped with a gemstone fringe of various tourmalines, blue and pink sapphires and blue topaz as well as a circle of amethyst agate. The silver is argentium sterling silver  (.935) for added tarnish resistance. The focal measures about 1 1/4 by 1 1/4 inches on a chain that extends from 16 to 18 inches.