These stacked layers are all about color. At the center where it all begins is a boulder opal of violet, brown, tangerine, pink ... you get the picture. Above I added mixed tourmalines, amethyst and rhodolite garnet wrapped in gold. And below the opal is a fringe of spessartite garnet, pink sapphire, amethyst, champagne citrine and a few brown tourmalines. The chain adjusts from 16 to 18 inches.