Dust is a new item specifically from Ex Nihilo. It is made from grinding or hammering sand . It can be sieved for Ore Dust, Blaze powder, Certuz Quartz Dust, Gunpowder, Redstone Dust, Glowstone Dust and Bone Meal. When put into a barrel filled with water, both are consumed to produce one block of clay.
SkyFactory mod pack allows dust to be automated using Automous Activators, turtles, and pulverizers