The Dakota Stones matte onyx 12mm square beads are versatile enough to work in any design. Available in 8-inch strands, these beads feature black color with a matte finish. These beads display a square shape with rounded edges. 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. Add these beads to a necklace or bracelet design for cool shape and color that contrasts beautifully with any color palette.