Graywood 6mm to 6.5mm beads on a 16" strand containing 72 beads. Graywood (scientific name Sporobolus Vaginiflorus) beads are made from a Philippine Kunawom Tree. The Greywood Beads are not stained. The beads turn a natural shade of gray when exposed to sun and heat. The range of colors in gray wood beads is what makes them such great options for more natural and neutral designs, since the colors are never overpowering and let components or more brightly colored beads draw the eye in.