Create striking style with natural material using the Dakota Stones matte onyx 8x14mm rectangle beads. Available in 8-inch strands, these beads feature an intense black color that will make any other colors stand out. These beads feature rectangular shapes with rounded edges. This material has been rendered a uniform and permanent black color with a treatment of sugar and acid. This process has been used on the gemstone for thousands of years and is water safe. These beads are polished and then tumbled to achieve the matte finish. Mined in Brazil, India and Madagascar, onyx is said to enhance steadfastness and determination, setting one's mind to a task. Contrast these beads with bright colors for a design everyone will fall in love with.