Add elegant gemstones to your designs with the Dakota Stones matte onyx 10x20mm rice beads. Available in 8-inch strands, these beads feature versatile black color and a matte finish full of soft shine. These beads feature an almond shape. 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 any bright colors for a bold look.