--- product_id: 654314707 title: "400/600 Grit Silicon Carbide Rock Tumbler Grit, Stage 3 Pre Polish Rock Polishing Grit 5 lb, Stone Polishing Compound for Rotary & Vibratory Tumblers, Lapidary Supply" brand: "mjr tumblers" price: "¥17208" currency: JPY in_stock: true reviews_count: 1 category: "Mjr Tumblers" url: https://www.desertcart.jp/products/654314707-400-600-grit-silicon-carbide-rock-tumbler-grit-stage-3 store_origin: JP region: Japan --- # Rotary & vibratory compatible 400/600 grit precision USA veteran-owned quality 400/600 Grit Silicon Carbide Rock Tumbler Grit, Stage 3 Pre Polish Rock Polishing Grit 5 lb, Stone Polishing Compound for Rotary & Vibratory Tumblers, Lapidary Supply **Brand:** mjr tumblers **Price:** ¥17208 **Availability:** ✅ In Stock ## Summary > ✨ Elevate your rock polishing game with pro-grade grit ⚙️ ## Quick Answers - **What is this?** 400/600 Grit Silicon Carbide Rock Tumbler Grit, Stage 3 Pre Polish Rock Polishing Grit 5 lb, Stone Polishing Compound for Rotary & Vibratory Tumblers, Lapidary Supply by mjr tumblers - **How much does it cost?** ¥17208 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/654314707-400-600-grit-silicon-carbide-rock-tumbler-grit-stage-3) ## 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:** Perfect for rocks, minerals, and glass projects—versatility that sparks creativity. - • **Stage 3 Surface Refinement:** Smooths and preps stones by reducing scratches for that flawless finish. - • **Trusted Veteran-Owned Brand:** Support quality and reliability from a USA-based disabled veteran-owned company. - • **Universal Tumbler Compatibility:** Seamlessly works with both rotary and vibratory tumblers to fit your workflow. - • **Premium Silicon Carbide Abrasion:** Delivers consistent, even polishing power across all your stones and minerals. ## Overview This 5 lb bag of 400/600 grit silicon carbide is designed as the essential Stage 3 pre-polish for rock tumblers, delivering consistent abrasion to refine surfaces and prepare stones, minerals, and glass for final polishing. Compatible with rotary and vibratory tumblers, it’s a versatile, premium-quality product from a trusted USA veteran-owned brand. ## Description Product description Review: Iron contamination - Unfortunately the bag I got was highly contaminated with iron. Check the video ## Features - STAGE 3 PRE-POLISH FOR SURFACE REFINEMENT: This 400/600 grit silicon carbide is designed for the third stage of rock tumbling, helping refine stone surfaces after shaping and smoothing. It reduces visible scratches and prepares stones for the final polishing stage. - PREMIUM SILICON CARBIDE FOR CONSISTENT PERFORMANCE: Made from high-quality silicon carbide, this grit delivers even abrasion across stones. Designed to support a smooth transition between stages, helping improve surface consistency before final polishing. - COMPATIBLE WITH ROTARY & VIBRATORY TUMBLERS: Works with most rock tumblers, including rotary and vibratory machines. A versatile option for maintaining your polishing workflow or replacing Stage 3 grit in your process. - IDEAL FOR ROCKS, MINERALS & GLASS PROJECTS: Suitable for a variety of materials including stones, minerals, and glass. Helps improve surface smoothness and prepares materials for achieving a polished finish. - USA OWNED BRAND WITH TRUSTED QUALITY: Offered by a USA-based, disabled and veteran-owned company. MJR Tumblers provides reliable rock tumbling supplies designed for consistent performance and ease of use. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CP8VC7PK | | Best Sellers Rank | #7,505 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #4 in Tumbling Media | | Brand | MJR Tumblers | | Brand Name | MJR Tumblers | | Compatible Material | Premium Silicon Carbide | | Customer Reviews | 4.3 out of 5 stars 16 Reviews | | Grit Material | Premium Silicon Carbide | | Grit Material Type | Premium Silicon Carbide | | Grit Number | 600 | | Grit Type | Super Fine | | Included Components | Instructions and Grit | | Item Weight | 5 Pounds | | Manufacturer | MJR Tumblers | | Material | Premium Silicon Carbide | | Material Type | Premium Silicon Carbide | | Number of Items | 1 | | Part Number | MJR5p400/600 | | Unit Count | 1.0 Count | ## Images ![400/600 Grit Silicon Carbide Rock Tumbler Grit, Stage 3 Pre Polish Rock Polishing Grit 5 lb, Stone Polishing Compound for Rotary & Vibratory Tumblers, Lapidary Supply - Image 1](https://m.media-amazon.com/images/I/51Tu6B8OQtL.jpg) ![400/600 Grit Silicon Carbide Rock Tumbler Grit, Stage 3 Pre Polish Rock Polishing Grit 5 lb, Stone Polishing Compound for Rotary & Vibratory Tumblers, Lapidary Supply - Image 2](https://m.media-amazon.com/images/I/71X117QdftL.jpg) ![400/600 Grit Silicon Carbide Rock Tumbler Grit, Stage 3 Pre Polish Rock Polishing Grit 5 lb, Stone Polishing Compound for Rotary & Vibratory Tumblers, Lapidary Supply - Image 3](https://m.media-amazon.com/images/I/71+z2h0xz-L.jpg) ![400/600 Grit Silicon Carbide Rock Tumbler Grit, Stage 3 Pre Polish Rock Polishing Grit 5 lb, Stone Polishing Compound for Rotary & Vibratory Tumblers, Lapidary Supply - Image 4](https://m.media-amazon.com/images/I/61Ucm8mPkFL.jpg) ![400/600 Grit Silicon Carbide Rock Tumbler Grit, Stage 3 Pre Polish Rock Polishing Grit 5 lb, Stone Polishing Compound for Rotary & Vibratory Tumblers, Lapidary Supply - Image 5](https://m.media-amazon.com/images/I/71DTJNIyMiL.jpg) ## Available Options This product comes in different **Size, Style** options. ## Customer Reviews ### ⭐ Iron contamination *by B***F on August 22, 2025* Unfortunately the bag I got was highly contaminated with iron. Check the video --- ## 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/654314707-400-600-grit-silicon-carbide-rock-tumbler-grit-stage-3](https://www.desertcart.jp/products/654314707-400-600-grit-silicon-carbide-rock-tumbler-grit-stage-3) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-09-16*