Give your designs a dark and mysterious focal piece with the Dakota Stones matte onyx 30x40mm oval beads. Available in 8-inch strands, these beads feature an inky black color with a soft matte finish. These beads feature a large oval shape, perfect for using as focal beads. 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. Use these large beads as a backdrop for smaller, more colorful beads.