Natural Stone Slab Appraisal

Rectangular Blue-Grey Stone Slab

This is a rectangular slab of natural stone, likely a variety of bluestone, slate, or fine-grained limestone, characterized by its consistent blue-grey hue and subtle cloudy texture. The stone displays a matte, unpolished finish with visible surface irregularities that suggest a honed or naturally cleft treatment before being industrially cut. Measuring approximately 12 by 18 inches, the block shows clean, straight edges with slight jaggedness along the right vertical perimeter, indicating a mechanical saw cut rather than hand-tooling. The surface is punctuated by faint white mineral inclusions and a fine-grained crystalline structure typical of sedimentary or metamorphic rock. Notably, there are some scuff marks and white powdery residue on the top left and bottom edges, possibly from transport or the cutting process itself. No visible maker’s marks, signatures, or serial numbers are present on the upward-facing surface. The stone appears to be in excellent contemporary condition with no structural cracks or major chips, resting on modern plastic packaging which suggests it is a relatively new architectural sample or a piece of tiling material.