These Dakota Stones matte onyx 8mm faceted rondelle beads are perfect for any design. Available in 8-inch strands, these beads feature a solid black shade that glints mysteriously in the light. These rounded beads feature diamond-shaped facets all over their surface. This material has been rendered a uniform and permanent black color with a treatment by 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 beads with bright colors to make them pop.