You can create bold style with the matte onyx 8mm round beads from Dakota Stones. These spherical beads display a solid shade of black, the perfect color to add to designs to make brighter tones pop. The 8mm size works nicely in both necklaces and bracelets. 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.