--- product_id: 650250805 title: "1 LB per Polish Sub Micron Aluminum Oxide 12,000 Extreme Polish Rock Grit Stage 4 | USA" brand: "mjr tumblers" price: "¥13385" currency: JPY in_stock: true reviews_count: 9 category: "Mjr Tumblers" url: https://www.desertcart.jp/products/650250805-1-lb-per-polish-sub-micron-aluminum-oxide-12-000 store_origin: JP region: Japan --- # 12,000 grit ultra-fine polish 1 lb precision polishing powder Proudly USA made 1 LB per Polish Sub Micron Aluminum Oxide 12,000 Extreme Polish Rock Grit Stage 4 | USA **Brand:** mjr tumblers **Price:** ¥13385 **Availability:** ✅ In Stock ## Summary > ✨ Elevate your rock tumbling game to flawless brilliance! 🇺🇸 ## Quick Answers - **What is this?** 1 LB per Polish Sub Micron Aluminum Oxide 12,000 Extreme Polish Rock Grit Stage 4 | USA by mjr tumblers - **How much does it cost?** ¥13385 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/650250805-1-lb-per-polish-sub-micron-aluminum-oxide-12-000) ## Best For - mjr tumblers enthusiasts ## Why This Product - Trusted mjr tumblers brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Veteran-Owned Quality:** Support a disabled and veteran-owned American company with every purchase - • **Effortless Shine Boost:** Achieve professional-grade polish in just 4 days, even on tough stones like basalt - • **Expert Guidance Included:** Free, easy-to-follow instructions with insider tips to maximize your tumbling success - • **Complete Polishing Solution:** Perfect as a final polish stage or an extra step for unbeatable results - • **Unmatched Ultra-Fine Polish:** 12,000 grit is 10x finer than standard 1,200 grit for a mirror-like finish ## Overview MJR Tumblers’ 1 lb 12,000 grit Sub Micron Aluminum Oxide Polish delivers an ultra-fine, extreme polish that outperforms standard 1,200 and 1,500 grit powders by tenfold. Proudly made in the USA by a disabled and veteran-owned company, this premium polishing powder guarantees a superior shine in just days, supported by clear, expert instructions for both beginners and pros. ## Description Product Description Review: Amazing shine, better than step 4 in kits - I’m new to rock tumbling and for my first batch used the grits that came with my tumbler. After the full 4 week process I wasn’t happy with the shine, so I sought out a better product for a final polish rather than resorting to mineral oil and faking it. The difference this made with 4 days as a second final polish was amazing, even basalt has come up with a shine. I added a spoonful of baking soda to the barrel with this and there was no fizzing/pressure, and rinsing off was easy and quick. I’ve not tried this as step 4 (rather than adding a second polish as step 5) but will do on my next batch. Review: Great finish 🪞 - Only used on 1 barrel of “beach rocks” so far but very impressed with the level of polish it provides, used 80-200-600-1200 grits a week at a time then a final polish with this, Much Much better finish than just the “standard” 4 stages of rock tumbling provides. ## Features - There is No comparison in the results between MJR Tumbler's Exclusive 12,000 grit Sub Micron Extreme Aluminum Oxide Polish and our competitors 1,200 grit or 1,500 grit Aluminum Oxide. 12,000 grit is ten times finer than 1,200 grit with ten times better results! - MJR Tumbler’s Exclusive 12,000 Grit Sub Micron Extreme Aluminum Oxide Polish is the best polish you can buy! - No other polish even comes close to our results. - If you want the best, MJR Tumblers 12,000 Grit Sub Micron Aluminum Oxide Extreme Polish is what you need! - MJR Tumblers is a Disabled and Veteran Owned Company! - Free and easy to understand rock polishing instructions with lots of tips and tricks are included with every purchase from MJR Tumblers! - MJR Tumblers is Proud to be an American company located in Pecatonica Illinois in the good ole USA! ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0D4PLX9YP | | Best Sellers Rank | 82,290 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 51 in Tumbling Media | | Brand | MJR Tumblers | | Compatible Material | Aluminium | | Customer Reviews | 4.7 out of 5 stars 124 Reviews | | Grit Material Type | Aluminium Oxide | | Grit Number | 12000 | | Grit Type | Fine | | Grit material | Aluminium Oxide | | Grit number | 12000 | | Grit type | Fine | | Item Weight | 1 Pounds | | Item weight | 1 Pounds | | Manufacturer | MJR Tumblers | | Manufacturer Part Number | MJR-12000-1LB | | Material | Aluminium Oxide | | Unit Count | 1.0 count | ## Product Details - **Brand:** MJR Tumblers - **Grit material:** Aluminium Oxide - **Grit type:** Fine - **Item weight:** 454 g - **Material:** Aluminium Oxide ## Images ![1 LB per Polish Sub Micron Aluminum Oxide 12,000 Extreme Polish Rock Grit Stage 4 | USA - Image 1](https://m.media-amazon.com/images/I/61nvojo7R0L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Amazing shine, better than step 4 in kits *by A***M on 7 November 2025* I’m new to rock tumbling and for my first batch used the grits that came with my tumbler. After the full 4 week process I wasn’t happy with the shine, so I sought out a better product for a final polish rather than resorting to mineral oil and faking it. The difference this made with 4 days as a second final polish was amazing, even basalt has come up with a shine. I added a spoonful of baking soda to the barrel with this and there was no fizzing/pressure, and rinsing off was easy and quick. I’ve not tried this as step 4 (rather than adding a second polish as step 5) but will do on my next batch. ### ⭐⭐⭐⭐⭐ Great finish 🪞 *by C***G on 8 November 2025* Only used on 1 barrel of “beach rocks” so far but very impressed with the level of polish it provides, used 80-200-600-1200 grits a week at a time then a final polish with this, Much Much better finish than just the “standard” 4 stages of rock tumbling provides. ### ⭐⭐⭐⭐⭐ A great Polish *by A***R on 11 September 2025* A GREAT PRODUCT WHICH DOES WHAT IT SAYS IT WILL DO. 100*/100* ## Frequently Bought Together - 1 Pound of MJR Tumblers Premium Quality Extreme Polish 12,000 Grit Sub Micron Aluminum Oxide Rock Polishing Powder. for Unparalleled Quality and Performance. A Disabled and Veteran Owned Company! - 4lb of MJR Tumblers Premium 400/600 Pre-Polish Aluminum Oxide Rock Polishing Grit for Step/Stage 3, MJR Tumblers is a Disabled and Veteran Owned Company Proudly Located in USA - 10 lbs Rock Tumbler Grit - Tumbler Media Grit,Rock Polishing Grit Media, Works with Any Rock Tumbler, Rock Polisher, Stone Polisher,COARSE 60/90 Silicon Carbide Grit, Step 1 for Tumbling Stones --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/650250805-1-lb-per-polish-sub-micron-aluminum-oxide-12-000](https://www.desertcart.jp/products/650250805-1-lb-per-polish-sub-micron-aluminum-oxide-12-000) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-05*