Lightweight pumice sand + tiny 1/8-inch stones. Use in lighweight mortars and as an additive to the lightweight craft aggregate when more sand content is desired.
About Pumice: Pumice is literally a foamed stone, formed in the awesome heat and violence of a volcano. Pumice stones—including the sand—are riven with nooks and crannies and air pockets that provide the lightweight character and insulative quality..
