---
product_id: 48271698
title: "NATIONAL GEOGRAPHIC Rock Tumbler Grit - 1.49kg Polishing Grit Media for Any Rock Tumbler, Rock & Stone Polisher, Polishes 3.63 - 4.54kg of Rocks"
brand: "blue marble"
price: "VT54032"
currency: VUV
in_stock: true
reviews_count: 8
category: "Blue Marble"
url: https://www.desertcart.vu/products/48271698-national-geographic-rock-tumbler-grit-1-49kg-polishing-grit-media
store_origin: VU
region: Vanuatu
---

# Secure screw-top storage Polishes up to 9 kg of rocks 4-stage precision grit system NATIONAL GEOGRAPHIC Rock Tumbler Grit - 1.49kg Polishing Grit Media for Any Rock Tumbler, Rock & Stone Polisher, Polishes 3.63 - 4.54kg of Rocks

**Brand:** blue marble
**Price:** VT54032
**Availability:** ✅ In Stock

## Summary

> 🪨 Transform ordinary stones into dazzling gems—polish like a pro!

## Quick Answers

- **What is this?** NATIONAL GEOGRAPHIC Rock Tumbler Grit - 1.49kg Polishing Grit Media for Any Rock Tumbler, Rock & Stone Polisher, Polishes 3.63 - 4.54kg of Rocks by blue marble
- **How much does it cost?** VT54032 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/48271698-national-geographic-rock-tumbler-grit-1-49kg-polishing-grit-media)

## Best For

- blue marble enthusiasts

## Why This Product

- Trusted blue marble brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Bulk Power Pack:** 1.49kg of premium silicon carbide grit polishes up to 9 kg of stones and gems.
- • **4-Stage Grit Mastery:** From rough shaping to mirror polish, every step engineered for perfection.
- • **Universal Compatibility:** Seamlessly works with all rock tumblers—maximize your polishing potential.
- • **Effortless Storage & Use:** Wide-mouth, screw-top containers keep grit fresh and easy to measure.
- • **STEM-Approved Educational Fun:** Hands-on science meets stunning results—perfect for curious minds 8+.

## Overview

The NATIONAL GEOGRAPHIC Rock Tumbler Grit is a high-quality 4-stage silicon carbide grit kit designed to polish up to 9 kg of rocks, gems, and glass. Compatible with all rock tumblers, it features easy-to-use, securely packaged grit stages that deliver professional-grade results while promoting geological learning for ages 8 and up.

## Description

NATIONAL GEOGRAPHIC Rock Tumbler Grit - 1.49kg Polishing Grit Media for Any Rock Tumbler, Rock & Stone Polisher, Polishes 3.63 - 4.54kg of Rocks : desertcart.co.uk: Home & Kitchen

Review: Rock tumbler - Ideal hobby rock tumbler
Review: Perfect size for the rock tumbler! - Exactly what I needed, more grit for my tumbler! I recently got some of my own beach rocks; quartz and serpentine, possibly some granite, and I needed these to tumble away! Good size, easy to use, functions as it should, measuring spoon and instructions made it easy to use. Think this is probably fun for kids, but definitely is for adults!

## Features

- HIGH QUALITY – This rock polisher grit refill pack comes with enough high-quality silicon carbide grit to put a dazzling polish on up to 9 kg of rocks, gems, glass, and more
- EASY TO USE FOUR-STAGE ROCK GRIT - The first rock tumbling grit stage provides initial shaping, the second smooths rock surfaces, the third pre-polishes rocks, and the fourth provides the final polish
- COMPATIBLE WITH ALL TUMBLERS - This complete 4-step tumbling grit refill kit works with all rock polishers. For best results, use with National Geographic tumblers and rock tumbling supplies
- EASY TO MEASURE AND STORE - Each rock tumbling grit stage is packaged in a wide-mouth container with secure, screw-top closure
- HIGH-QUALITY EDUCATIONAL TOYS - We're proud to make the highest quality hands-on science toys, and all our products are backed by exceptional service. If your experience is less than stellar, let us know and we'll make things right!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01MRKI4W0 |
| Age Range Description | 8 years and up |
| Best Sellers Rank | 51,008 in Toys & Games ( See Top 100 in Toys & Games ) 571 in Educational Science Kits |
| Brand Name | Blue Marble |
| Colour | Black |
| Customer Reviews | 4.6 out of 5 stars 14,782 Reviews |
| Educational Objective | Promote geological knowledge and provide practical learning experiences related to rocks and minerals |
| Global Trade Identification Number | 00816448020636 |
| Included Components | 10 mL Grit Scoop, 4 Stages of Rock Polishing Grit, Rock Tumbling Instructions |
| Indoor Outdoor Usage | Indoor |
| Is Assembly Required | No |
| Item Dimensions | 14 x 14 x 10.8 centimetres |
| Item Type Name | Rock Tumbler Grit - Rock Polishing Grit Media |
| Item Weight | 1.78 Kilograms |
| Manufacturer | National Geographic |
| Manufacturer Part Number | NGBULKGRIT |
| Manufacturer Warranty Description | We're proud to make the highest quality products which are backed by exceptional service. |
| Material Type | Carbide of Silicon |
| Maximum Age Recommendation | 1188.00 |
| Minimum Age Recommendation | 96.00 |
| Model Number | NGBULKGRIT |
| Number of Players | 1 |
| Operation Mode | Manual |
| Set Name | Stone Bite Set |
| Size | M |
| Sub Brand | National Geographic |
| Supported Battery Types | No batteries required |
| Theme | Science |
| UPC | 816448020636 |
| Unit Count | 1.0 count |

## Images

![NATIONAL GEOGRAPHIC Rock Tumbler Grit - 1.49kg Polishing Grit Media for Any Rock Tumbler, Rock & Stone Polisher, Polishes 3.63 - 4.54kg of Rocks - Image 1](https://m.media-amazon.com/images/I/81+X8uILF3L.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: How many oz is in each container?**
A: 1 Coarse-16oz.  2 Medium-13oz.  3 Pre-polish-12oz.  4 Polish-11.5 oz.

**Q: I just opened this and finished with grit one,  went to put grit 2 in and bottle open and 1/2 full. How do I contact seller?**
A: I would go through Amazon to get an answer for your problem.

**Q: Can it be used together ?**
A: Each grit is a different fineness intended for a specific purpose. We do not recommend using them at the same time.  We do recommend 1 TBS grit per per 1 LB rocks, at each cycle. For further information please contact us at help@natgeotoys.com.

**Q: After each step for the rocks in the kit, my rocks dry with a dull white finish.  It doesn't show when it is wet. Am I doing something wrong?**
A: No.  I find that after tumbling with the finest grit after the last step... and thoroughly allowing the rocks to dry, a nice coat of wax or oil brings out the color beautifully.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Rock tumbler
*by A***R on 4 December 2025*

Ideal hobby rock tumbler

### ⭐⭐⭐⭐⭐ Perfect size for the rock tumbler!
*by K***M on 17 October 2025*

Exactly what I needed, more grit for my tumbler! I recently got some of my own beach rocks; quartz and serpentine, possibly some granite, and I needed these to tumble away! Good size, easy to use, functions as it should, measuring spoon and instructions made it easy to use. Think this is probably fun for kids, but definitely is for adults!

### ⭐⭐⭐⭐⭐ Perfect Refill Set
*by S***E on 29 May 2025*

Perfect refill pack. More than enough quality materials to keep us tumbling rocks for many, many months. Great value and includes instructions, which was very handy as we misplaced the ones that came with the tumbler itself.

## Frequently Bought Together

- Blue Marble National Geographic Rock Tumbler Grit and Polish Refill Kit - Tumbling Grit Media, Polish Up to 20 lbs. of Rocks, Works with Any Rock Polisher, Rock Tumbler Supplies
- National Geographic Rock Tumbler Kit – Hobby Edition Includes Rough Gemstones, and 4 Polishing Grits, Great STEM Science Kit for Geology Enthusiasts, Rock Polisher for Kids and Adults
- UU UNIHOM 3 lbs Bulk Rough Madagascar Stones Mix Large 1" Natural Raw Stones Crystal for Tumbling, Cabbing, Fountain Rocks, Decoration,Polishing, Wire Wrapping, Wicca Reiki Crystal Healing

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-05-11*