Polishing a petrified wood slab is a meticulous yet deeply rewarding craft, transforming a dull, weathered fossil into a striking, mirror-like surface. Because petrified wood is primarily composed of quartz—with a hardness of about 7 on the Mohs scale—the process demands patience and precision, using abrasives harder than the stone itself. Achieving a professional finish requires a variable-speed wet polisher or angle grinder fitted with a ground fault circuit interrupter and diamond polishing pads, progressing gradually from coarse 50-grit to ultra-fine 3000-grit. Continuous water flow is essential throughout the process to control heat, suppress dust, and reveal the rich colors and intricate mineral patterns, resulting in a flawless, high-gloss finish that showcases the fossil’s natural beauty. https://www.indogemstone.com/polished-petrified-wood