--- product_id: 99843600 title: "60/90 Grit Silicon Carbide Rock Tumbler Grit, Extra Coarse Stage 1 Rock Polishing Grit, 2 lb Stone Polishing Compound for Rotary & Vibratory Tumblers, Lapidary Supply" brand: "mjr tumblers" price: "R1444" currency: ZAR in_stock: true reviews_count: 8 category: "Mjr Tumblers" url: https://www.desertcart.co.za/products/99843600-60-90-grit-silicon-carbide-rock-tumbler-grit-extra-coarse store_origin: ZA region: South Africa --- # Works with rotary & vibratory tumblers Aggressive cutting for faster material removal 60/90 grit extra coarse for rapid shaping 60/90 Grit Silicon Carbide Rock Tumbler Grit, Extra Coarse Stage 1 Rock Polishing Grit, 2 lb Stone Polishing Compound for Rotary & Vibratory Tumblers, Lapidary Supply **Brand:** mjr tumblers **Price:** R1444 **Availability:** ✅ In Stock ## Summary > ⚡ Shape stones like a pro — fast, flawless, and fiercely efficient! ## Quick Answers - **What is this?** 60/90 Grit Silicon Carbide Rock Tumbler Grit, Extra Coarse Stage 1 Rock Polishing Grit, 2 lb Stone Polishing Compound for Rotary & Vibratory Tumblers, Lapidary Supply by mjr tumblers - **How much does it cost?** R1444 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/99843600-60-90-grit-silicon-carbide-rock-tumbler-grit-extra-coarse) ## 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 - • **Stage 1 Powerhouse:** Kickstart your rock polishing with ultra-aggressive 60/90 grit silicon carbide that shaves down rough edges fast. - • **Speed Meets Precision:** Experience rapid shaping and smoothing that preps stones perfectly for the finer polishing stages. - • **Universal Compatibility:** Seamlessly fits both rotary and vibratory tumblers, keeping your workflow smooth and uninterrupted. - • **Trusted American Quality:** Proudly USA-owned and veteran-operated brand delivering consistent, premium lapidary supplies. - • **Versatile for All Projects:** Ideal for rocks, minerals, and sea glass—perfect for hobbyists and pros aiming for flawless finishes. ## Overview MJR Tumblers 60/90 Grit Silicon Carbide is a premium, extra coarse 2 lb polishing compound designed for the initial stage of rock tumbling. Compatible with rotary and vibratory tumblers, it aggressively shapes and smooths stones, minerals, and sea glass, ensuring a fast and efficient start to your lapidary projects. Backed by a trusted USA-based veteran-owned brand, it offers reliable quality for hobbyists and professionals alike. ## Description MJR Tumblers 60/90 Grit Silicon Carbide Rock Tumbler Grit, Extra Coarse Stage 1 Rock Polishing Grit, 2 lb Stone Polishing Compound for Rotary & Vibratory Tumblers, Lapidary Supply: desertcart.com: Industrial & Scientific Review: Did the job very well - Works like it's supposed to, easy to use, good quality of grit, rocks look good after stage 1 polish. I will purchase this again as well as stage 2 and 3 grits. Review: Good grit - Excellent quality and the free shipping is a plus! ## Features - STAGE 1 EXTRA COARSE GRIT FOR INITIAL SHAPING: This 60/90 grit silicon carbide is designed for the first stage of rock tumbling, helping break down rough edges and shape stones. Ideal for starting the polishing process by removing surface imperfections and preparing rocks for finer stages. - AGGRESSIVE CUTTING FOR FASTER MATERIAL REMOVAL: The extra coarse grit provides strong abrasive action for shaping and smoothing hard materials. Suitable for reducing rough surfaces efficiently and preparing stones for the next stages of polishing. - COMPATIBLE WITH ROTARY & VIBRATORY TUMBLERS: Works with most rock tumblers, including rotary and vibratory machines. A versatile option for maintaining your rock polishing workflow or restocking Stage 1 grit. - IDEAL FOR ROCKS, MINERALS & SEA GLASS PROJECTS: Can be used on stones, minerals, and glass materials. Also suitable for creating textured finishes or shaping materials before finer polishing stages. - 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 | B07F97K8XL | | Best Sellers Rank | #8,238 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #7 in Tumbling Media | | Brand | MJR Tumblers | | Brand Name | MJR Tumblers | | Compatible Material | Premium Silicon Carbide | | Customer Reviews | 4.7 out of 5 stars 684 Reviews | | Grit Material | Premium Silicon Carbide | | Grit Material Type | Premium Silicon Carbide | | Grit Number | 90 | | Grit Type | Coarse | | Item Weight | 2 pounds | | Manufacturer | MJR Tumblers | | Material | Premium Silicon Carbide | | Material Type | Premium Silicon Carbide | | Part Number | MJR2p60/90 | ## Product Details - **Brand:** MJR Tumblers - **Grit Material:** Premium Silicon Carbide - **Grit Type:** Coarse - **Item Weight:** 2 pounds - **Material:** Premium Silicon Carbide ## Images ![60/90 Grit Silicon Carbide Rock Tumbler Grit, Extra Coarse Stage 1 Rock Polishing Grit, 2 lb Stone Polishing Compound for Rotary & Vibratory Tumblers, Lapidary Supply - Image 1](https://m.media-amazon.com/images/I/61fQ7YkslDL.jpg) ## Available Options This product comes in different **Size, Style** options. ## Questions & Answers **Q: All of my rocks are beach tumbled. Can I use just stage 3 and 4 to make them shiny. Do I need anything else?** A: Yes! I’ve done this and these 2 tumbles resulted in smooth and shiny rocks **Q: Why does this grit have two numbers? Is it two sizes of grit mixed together? That would seem pointless,** A: It is a mixture. **Q: How many loads can you get out of the 2lb bag typically?** A: I use 3 tbs of grit per tumbler. You will have to do the math and figure out how many tablespoons per pound then multiply by 2. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Did the job very well *by L***A on October 21, 2024* Works like it's supposed to, easy to use, good quality of grit, rocks look good after stage 1 polish. I will purchase this again as well as stage 2 and 3 grits. ### ⭐⭐⭐⭐⭐ Good grit *by P***L on December 4, 2025* Excellent quality and the free shipping is a plus! ### ⭐⭐⭐⭐⭐ Just #60-90 grit, nothing more *by D***S on April 28, 2026* The order came quickly, and was the best deal for #60-90 grit that I found. Other vendors created kits with additional packets of various sized grit, which I didn't need. --- ## 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.co.za/products/99843600-60-90-grit-silicon-carbide-rock-tumbler-grit-extra-coarse](https://www.desertcart.co.za/products/99843600-60-90-grit-silicon-carbide-rock-tumbler-grit-extra-coarse) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-10-09*