--- product_id: 602625708 title: "400/600 Grit 1lb Aluminum Oxide Rock Tumbler Pre Polish, Stage 3 Rock Polishing Grit for Stone Polishing, Compatible with Rotary & Vibratory Tumblers, Premium Lapidary Grit" brand: "mjr tumblers" price: "$47.35" currency: USD in_stock: true category: "Mjr Tumblers" url: https://www.desertcart.us/products/602625708-400-600-grit-1lb-aluminum-oxide-rock-tumbler-pre-polish store_origin: US region: United States of America --- # Rotary & vibratory compatible 400/600 grit precision USA veteran-owned quality 400/600 Grit 1lb Aluminum Oxide Rock Tumbler Pre Polish, Stage 3 Rock Polishing Grit for Stone Polishing, Compatible with Rotary & Vibratory Tumblers, Premium Lapidary Grit **Brand:** mjr tumblers **Price:** $47.35 **Availability:** ✅ In Stock ## Summary > ✨ Elevate your rock polishing game with pro-grade grit ⚙️ ## Quick Answers - **What is this?** 400/600 Grit 1lb Aluminum Oxide Rock Tumbler Pre Polish, Stage 3 Rock Polishing Grit for Stone Polishing, Compatible with Rotary & Vibratory Tumblers, Premium Lapidary Grit by mjr tumblers - **How much does it cost?** $47.35 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/602625708-400-600-grit-1lb-aluminum-oxide-rock-tumbler-pre-polish) ## 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 - • **Multi-Material Mastery:** Ideal for stones, minerals, and glass—expand your creative horizons with one grit. - • **Versatile Compatibility:** Seamlessly works with both rotary and vibratory tumblers, fitting perfectly into your existing workflow. - • **Trusted Veteran-Owned Brand:** Support a USA-based, disabled veteran-owned company delivering dependable lapidary excellence. - • **Premium Aluminum Oxide Power:** High-quality abrasive ensures consistent, even polishing results every time. - • **Flawless Pre-Polish Precision:** Stage 3 grit engineered to smooth and refine stone surfaces, eliminating scratches for a flawless finish. ## Overview MJR Tumblers 400/600 Grit Aluminum Oxide is a premium stage 3 pre-polish grit designed for rotary and vibratory rock tumblers. This super fine abrasive smooths and refines stones, glass, and minerals, preparing them perfectly for final polishing. Made in the USA by a veteran-owned brand, it guarantees consistent, high-quality results for serious hobbyists and professionals alike. ## Description MJR Tumblers 400/600 Grit 1lb Aluminum Oxide Rock Tumbler Pre Polish, Stage 3 Rock Polishing Grit for Stone Polishing, Compatible with Rotary & Vibratory Tumblers, Premium Lapidary Grit: desertcart.com: Industrial & Scientific ## Features - STAGE 3 PRE-POLISH FOR SMOOTH TRANSITION: This 400/600 grit aluminum oxide is designed for the third stage of rock tumbling, refining stone surfaces after initial shaping and smoothing. Helps prepare rocks for final polishing by reducing visible scratches and improving surface consistency. - PREMIUM ALUMINUM OXIDE FOR CONSISTENT RESULTS: Made from high-quality aluminum oxide, this grit provides reliable performance during the pre-polish stage. Designed to deliver even abrasion across stones, helping achieve a smooth and uniform finish before final polishing. - COMPATIBLE WITH ROTARY & VIBRATORY TUMBLERS: Suitable for use with most rock tumblers, including rotary and vibratory machines. A versatile option for maintaining your rock polishing process or replacing stage 3 grit in your workflow. - IDEAL FOR ROCKS, GLASS & LAPIDARY USE: Can be used for polishing stones, minerals, and even glass materials. Provides flexibility for a range of polishing applications, making it a useful addition to any rock tumbling setup. - USA OWNED BRAND WITH TRUSTED QUALITY: Offered by a USA-based, disabled and veteran-owned company. MJR Tumblers provides dependable rock tumbling supplies designed for consistent performance and ease of use. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CP8WFYXV | | Best Sellers Rank | #17,411 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #36 in Tumbling Media | | Brand Name | MJR Tumblers | | Compatible Material | Premium Quality Aluminum Oxide | | Customer Reviews | 4.3 4.3 out of 5 stars (18) | | Grit Material Type | Premium Quality Aluminum Oxide | | Grit Number | 600 | | Grit Type | Super Fine | | Included Components | Instructions and Grit | | Manufacturer | MJR Tumblers | | Material Type | Premium Quality Aluminum Oxide | | Number of Items | 1 | | Part Number | MJR1p400/600AO | | Unit Count | 1.0 Count | ## Product Details - **Brand:** MJR Tumblers - **Grit Material:** Premium Quality Aluminum Oxide - **Grit Number:** 600 - **Grit Type:** Super Fine - **Material:** Premium Quality Aluminum Oxide ## Images ![400/600 Grit 1lb Aluminum Oxide Rock Tumbler Pre Polish, Stage 3 Rock Polishing Grit for Stone Polishing, Compatible with Rotary & Vibratory Tumblers, Premium Lapidary Grit - Image 1](https://m.media-amazon.com/images/I/51FmTcNLZ0L.jpg) ![400/600 Grit 1lb Aluminum Oxide Rock Tumbler Pre Polish, Stage 3 Rock Polishing Grit for Stone Polishing, Compatible with Rotary & Vibratory Tumblers, Premium Lapidary Grit - Image 2](https://m.media-amazon.com/images/I/71VEE0eqiZL.jpg) ![400/600 Grit 1lb Aluminum Oxide Rock Tumbler Pre Polish, Stage 3 Rock Polishing Grit for Stone Polishing, Compatible with Rotary & Vibratory Tumblers, Premium Lapidary Grit - Image 3](https://m.media-amazon.com/images/I/71d6xQMgukL.jpg) ![400/600 Grit 1lb Aluminum Oxide Rock Tumbler Pre Polish, Stage 3 Rock Polishing Grit for Stone Polishing, Compatible with Rotary & Vibratory Tumblers, Premium Lapidary Grit - Image 4](https://m.media-amazon.com/images/I/61UV0iJ0o5L.jpg) ![400/600 Grit 1lb Aluminum Oxide Rock Tumbler Pre Polish, Stage 3 Rock Polishing Grit for Stone Polishing, Compatible with Rotary & Vibratory Tumblers, Premium Lapidary Grit - Image 5](https://m.media-amazon.com/images/I/71cJ5kYQK2L.jpg) ## Available Options This product comes in different **Size, Style** options. --- ## 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.us/products/602625708-400-600-grit-1lb-aluminum-oxide-rock-tumbler-pre-polish](https://www.desertcart.us/products/602625708-400-600-grit-1lb-aluminum-oxide-rock-tumbler-pre-polish) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-23*