Generally, there are three distinct methods for finishing a briar pipe: smooth, sandblast (see also rusticated), and carved.  Pipes can also come in any combination of these finishes, be stained in a variety of colors and shades, or be painted as well.

A smooth finish is sanded and buffed to perfection, while a sandblast finish is achieved by “sandblasting” the briar with compressed air and sand (or other small particulates): sandblast pipes are also commonly called "rustic", but there is a distinct difference between sandblast and rusticated.  A carved finish is achieved by shaping the wood texture and shape by hand, with a blade.

Sandblast vs Rusticated - Learn More - CMT Contribution