Hand polishing a petrified wood slab is a demanding yet achievable process that depends on careful grit progression, consistent lubrication, and controlled speed to achieve a deep, “wet” mirror finish. The process begins with progressive wet sanding using diamond polishing pads, starting at 50–100 grit for initial shaping and surface correction, then advancing through 200, 400, 800, 1500, and finally 3000 grit to develop a high-gloss polish. When polishing with an angle grinder, a variable-speed wet polisher or wet-rated grinder is essential to safely control heat, reduce dust, and prevent surface fracturing. Continuous water flow throughout each stage is critical to cooling the stone, clearing debris, and preserving the integrity of the fossilized material. https://www.indogemstone.com/polished-petrified-wood