Rustication is generally made by taking some sort of homemade tool or dremel and gouging out pieces of the briar. Done a lot of times to hide flaws in wood, and by proxy, hides the grain. With sandblasted, they put it in a cabinet with a window on it and hit it with pressurized air and some sort of medium... i.e. walnut shells, glass beads, sand, etc... the soft spots in the wood are removed in a natural pattern, hiding straight grain, but revealing the rings, such is the case with the calabash shaped one. I'm a pedant, and it is a pet peeve of mine when I see rustication and sandblasted used interchangeably. Like when a Devil Anse pipe is called a Devil's Anse. It was named after someone, not one of Lucifer's posessions. And when brindle colored acrylic is referred to as Cumberland. I can get off on a tangent about "Cumberland" being a Dunhill name for red/black vulcanite, but whatever.