Light amethyst is the predominant color, but there are certainly yellow highlights. These beads are pictured on yellow string which highlights the flashes of citrine. The beads are a unique shape. They are four-sides squares with some faceting. A diamond shape is on each face. I know I am not describing these well, but I am doing my best. The beads are on average 12 mm long and 6 mm thick. Each strand is 16 inches long and contains approximately 32 beads.