---
product_id: 10486562
title: "Rock Tumbling Grit Coarse 5 lb 60/90 Silicon Carbide Refill Fundamental Rockhound"
brand: "the fundamental rockhound"
price: "12588 kr"
currency: ISK
in_stock: true
reviews_count: 9
url: https://www.desertcart.is/products/10486562-rock-tumbling-grit-coarse-5-lb-60-90-silicon-carbide
store_origin: IS
region: Iceland
---

# 60/90 grit size 5 lb capacity Made in USA Rock Tumbling Grit Coarse 5 lb 60/90 Silicon Carbide Refill Fundamental Rockhound

**Brand:** the fundamental rockhound
**Price:** 12588 kr
**Availability:** ✅ In Stock

## Summary

> ✨ Unleash Your Inner Geologist! ✨

## Quick Answers

- **What is this?** Rock Tumbling Grit Coarse 5 lb 60/90 Silicon Carbide Refill Fundamental Rockhound by the fundamental rockhound
- **How much does it cost?** 12588 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/10486562-rock-tumbling-grit-coarse-5-lb-60-90-silicon-carbide)

## Best For

- the fundamental rockhound enthusiasts

## Why This Product

- Trusted the fundamental rockhound brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Easy to Use:** Just add to your tumbler and watch the magic happen!
- • **Eco-Friendly Choice:** Crafted from sustainable materials.
- • **Transform Your Rocks:** Achieve a polished finish with our premium grit!
- • **Quality You Can Trust:** AAA quality graded for consistent results.
- • **Perfect for Enthusiasts:** Ideal for both beginners and seasoned rockhounds.

## Overview

This 5 lb bag of coarse 60/90 silicon carbide grit is designed for rock tumbling enthusiasts. Made in the USA and graded AAA quality, it ensures optimal polishing results for your rock collection.

## Description

Rock Tumbling Grit Coarse 5 lb 60/90 Silicon Carbide Refill Fundamental Rockhound

## Features

- Five pounds Coarse size 60/90 silicon carbide grit for rock tumbling.
- AAA Quality Graded Black Silicon Carbide Grit, Made in USA

## Images

![Rock Tumbling Grit Coarse 5 lb 60/90 Silicon Carbide Refill Fundamental Rockhound - Image 1](https://m.media-amazon.com/images/I/810lFjwinwL.jpg)

## Questions & Answers

**Q: Would this be a good product for tumbling glass? Im trying to make my own sea glass for craft projects.**
A: I use the heavier grit for glass I want to have the sea glass look. Usually 2 days on thick glass. Thinner glass like stained glass I use the fine.

**Q: What is the best way of discarding grit?**
A: I'm not sure of the best way, but I take it outside and rinse it out of the drum with a water hose.  We have a gravel walkway so this works for me.  Hope this helps.

**Q: New to tumbling. Are all coarse grit products created equal or do some work better for first step of tumbling?**
A: Each grit preparation is graded by particle size: the larger the number, the finer the grit and the less of your rock the grit will take off. For coarse grit, the lower the number (or range of numbers since the grit you buy has a range of particle sizes in it) the more rapidly it will grind down the rocks you are tumbling. If you are tumbling very hard rocks like quartz you might even need a coarser grit or repeated grinds of your usual coarse grit, or if you are grinding something soft like calcite, fluorite, or sea glass you might need to skip tumbling using coarse grit and go directly to medium. 

You may find that using similar products from different suppliers give you different results and sticking with the same compound (e.g. silicon carbide) from the same supplier gives you more predictable and satisfactory results.

You are embarking on a fascinating and creative, possibly lifetime journey--enjoy.

**Q: would this work for cleaning a bunch of really old coins?**
A: This is from rocktumbling.co:
What grit should I use with coins?
Some people like to tumble modern coins found with a metal detector.

The best grit to use on coins is pea gravel.

Before you tumble your coins, you will want to separate your valuable old coins from your clad as there are less destructive cleaning methods available to clean valuable coins.

Also, you will want to separate your copper from your other coins. If you have pennies with your nickels, dimes, and quarters, you will turn them to a copper color.

Pennies struck before 1983 are copper, so be sure to pull those out (if you can even read the dates).

If you tumble zinc pennies, be aware that some may not survive tumbling due to the nature of how zinc oxidizes.

Beyond coins, if you want to shine up other metals, crushed walnuts are the media of choice.

Make sure that you dry off any metal immediately and put it in an area that gets much airflow. Leaving metal wet after tumbling will cause it to tarnish and oxidize quickly.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Good Grit!
  

*by S***P on Reviewed in the United States on September 30, 2023*

Came quickly, good solid packaging!

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    Does the job
  

*by D***D on Reviewed in the United States on July 29, 2023*

Rock tumbling

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    BEAUTIFUL CRAZY LACE AGATES.  TOP SELLER
  

*by R***. on Reviewed in the United States on June 4, 2023*

Have wanted Crazy Lace agates since I began tumbling.  Beautiful they are.  The seller did everything the proper way A+++

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**Shop now:** [https://www.desertcart.is/products/10486562-rock-tumbling-grit-coarse-5-lb-60-90-silicon-carbide](https://www.desertcart.is/products/10486562-rock-tumbling-grit-coarse-5-lb-60-90-silicon-carbide)

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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-02-27*