Smooth Stone Slab is a gray stone block and a common main material in many styles. As a slab it is half a block tall, for floors, roof edges, and steps. Pair it with wood for warmth and a darker block such as deepslate for foundations and trim.
Blocks to try around it, picked by color and surface detail. These are suggestions, not rules.
Ranked by the average color of each block's texture. A close color is a starting point for a palette, not a rule.