Your designs will stand out with daring color when you use the dumortierite 8x10mm tumble nugget beads from Dakota Stones. These beads feature a nugget shape that makes each bead look like a pebble. All of the beads display a dark blue color streaked with hints of black. Dumortierite is vitreous and varies in color from blue, green and brown to the more rare violet and pink. It is said that this gemstone can enhance organizational abilities and orderliness. This gemstone is mined in North and South America, as well as Europe and Mozambique. These beads are available in 8-inch strands.