---
product_id: 650250805
title: "MJR Tumblers 1 LB per Polish Sub Micron Aluminum Oxide 12,000 Extreme Polish Rock Grit Stage 4 | USA"
brand: "mjr tumblers"
price: "€ 85.75"
currency: EUR
in_stock: true
reviews_count: 9
category: "Mjr Tumblers"
url: https://www.desertcart.gr/products/650250805-mjr-tumblers-1-lb-per-polish-sub-micron-aluminum-oxide
store_origin: GR
region: Greece
---

# 12,000 grit ultra-fine polish 1 lb precision aluminum oxide Proudly USA made MJR Tumblers 1 LB per Polish Sub Micron Aluminum Oxide 12,000 Extreme Polish Rock Grit Stage 4 | USA

**Brand:** mjr tumblers
**Price:** € 85.75
**Availability:** ✅ In Stock

## Summary

> ✨ Elevate Your Rock Game with 12,000 Grit Precision Polish 🇺🇸

## Quick Answers

- **What is this?** MJR Tumblers 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?** € 85.75 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/650250805-mjr-tumblers-1-lb-per-polish-sub-micron-aluminum-oxide)

## 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

- • **Trusted by Enthusiasts:** Top 10 in tumbling media with a 4.7-star rating from 82+ reviews—join the community of polished pros.
- • **Complete Guidance Included:** Free, easy-to-follow rock polishing instructions with expert tips ensure your success every time.
- • **Unmatched Ultra-Fine Polish:** 12,000 grit sub micron aluminum oxide delivers a mirror-like shine that outperforms standard 1,200-1,500 grit competitors by 10x.
- • **Effortless Rock Transformation:** Achieve professional-grade polish in just 4 days, turning even basalt into a dazzling finish.
- • **Veteran & Disabled Owned Excellence:** Support a proudly American company with roots in Pecatonica, Illinois, committed to quality and community.

## Overview

MJR Tumblers 1 LB 12,000 grit Sub Micron Aluminum Oxide Extreme Polish is a premium polishing compound designed for rock tumblers, delivering a superior shine that is ten times finer than standard polishes. Made in the USA by a veteran and disabled-owned company, it includes comprehensive instructions and is highly rated by users for transforming rough stones into brilliantly polished gems.

## Description

MJR Tumblers 1 LB per Polish Sub Micron Aluminum Oxide 12,000 Extreme Polish Rock Grit Stage 4 | USA : desertcart.co.uk: Business, Industry & Science

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 |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 21,452 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 10 in Tumbling Media |
| Customer Reviews | 4.7 4.7 out of 5 stars (82) |
| Date First Available | 28 July 2024 |
| Grit Description | Fine |
| Grit Number | 12000 |
| Item Weight | 454 g |
| Manufacturer | MJR Tumblers |
| Manufacturer reference | MJR-12000-1LB |
| Material | Aluminium Oxide |
| Package Dimensions | 20.9 x 14 x 3.3 cm; 453.59 g |
| Part number | MJR-12000-1LB |
| Size | 1 lb |

## Product Details

- **Brand:** MJR Tumblers
- **Grit material:** Aluminium Oxide
- **Grit type:** Fine
- **Item weight:** 454 g
- **Material:** Aluminium Oxide

## Images

![MJR Tumblers 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 P***! 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

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-03-08*