The commonest finish mentioned below is polished. A polished finish is one having a surface with high luster and strong reflection of incident light (almost mirror-like). The rougher finishes are bush-hammered, honed, sandblasted, and thermal. A bush-hammered finish is one with a rough uniformly patterned surface produced by an impact tool. A honed finish is one with a superfine, smooth, satinlike, nonreflective surface. A sandblasted surface is one with an irregular pitted surface produced by impacting sand particles at high velocity against a stone surface. A thermal (or flamed) finish is one with a rough nonreflective surface with only a few reflections from cleavage faces, produced by applying a high-temperature flame. This finish may change the natural color of the stone.