Give your designs touches of dark color with the matte onyx 6mm round beads from Dakota Stones. These beads are perfectly round in shape and feature black color with a muted shine. The versatile 6mm size is perfect for all kinds of jewelry designs and the color is sure to make brighter tones pop. This material has been rendered a uniform and permanent black color with a treatment by acid and sugar. This process has been used on this 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. These beads are available in 8-inch strands.