About This

• Standalone Step 5 Final Polish – 17000 Grit Aluminum Oxide for the Absolute Maximum Shine: This ultra-fine 17000-grit aluminum oxide polishing powder represents the pinnacle of rock tumbling polish. The sub-micron formula goes beyond what 12000 grit can achieve, eliminating the finest residual surface marks and delivering the absolute maximum gloss possible in a rock tumbler — reserved for collectors and enthusiasts who demand perfection.
• Even Higher Gloss Than 12000 Grit — The Ultimate Single-Step Finish Your Tumbler Can Deliver: Use 17000 grit as your standalone Step 5 for a premium, ultra-glossy finish from the start. For those seeking an even more advanced approach, it can also be run after 8000 grit as a two-stage ultra-fine polishing sequence. The result: the deepest, most brilliant luster achievable in a rotary or vibrating rock tumbler — no additional equipment needed.
• Premium Aluminum Oxide – Ultra-Fine Sub-Micron Formula: KomeStone's 17000-grit aluminum oxide uses the same high-purity formula as our 8000 and 12000 grit polishes, refined to an even finer particle size for superior surface finishing. Consistent, repeatable results across rocks, gemstones, quartz, agate, glass, and jewelry components. A reliable, high-performance alternative to tin oxide and cerium oxide polishes.
• Flexible Use – Standalone Step 5 for All Rock Tumblers, with an Advanced 2-Stage Option: Use 17000 grit directly as your standalone Step 5 for a premium finish right from the start. For the absolute ultimate finish, advanced users can run it after 8000 grit as a two-stage sequence (8000 → 17000). Works with rotary and vibrating rock tumblers of all brands. For the ultimate finish, run the complete KomeStone sequence: 8000 grit → 17000 grit.
• Easy Usage Guide – Resealable 1 lb Container: Add approximately 2 tablespoons (0.05 lb) of polishing powder per 1 lb of stones with enough water to just cover the load, and run for 3–5 days. Packaged in a resealable 1 lb container for easy storage and reorder. Results may vary depending on stone type, hardness, and equipment.
• Complete Your Rock Tumbling System – Full Grit Line from KomeStone: 17000 grit is the ultimate final step in KomeStone's complete multi-stage grit system. Pair with our 8000 grit (Step 5) and 12000 grit (Step 5/6) for a complete professional-grade polishing sequence. Also available: Full Stage Rock Tumbler Grit Kit (Steps 1–4) in 4 lb, 6 lb, and 10 lb sizes.
• KomeStone is designed for rock tumbling enthusiasts in the U.S., offering rock tumbling machines and grit systems for beginners and hobby users. The lineup includes the K Series (K1, K1 Pro, K2 Elite with noise-reduction design, K4 dual-barrel model, K5 for beginners) and the G Series (G1 4LB, G2 8LB, G3 22LB heavy-duty metal base). Some models feature upgraded motor designs, including brushless motor options, for more stable operation. A complete rock tumbling grit system is also available for multi-stage polishing and lapidary finishing. KomeStone provides reliable tools and ongoing support for rock tumbling hobbyists.