---
product_id: 109104746
title: "Rock Tumbler Media Grit Refill, Pre-Polish 500 Silicon Carbide Grit, Stage 3 for Tumbling Stones (2 Pack) (1 lb.)"
brand: "polly plastics"
price: "₨20484"
currency: LKR
in_stock: true
reviews_count: 13
category: "Polly Plastics"
url: https://www.desertcart.lk/products/109104746-rock-tumbler-media-grit-refill-pre-polish-500-silicon-carbide
store_origin: LK
region: Sri Lanka
---

# 500 grit pre-polish precision Universal tumbler compatibility Made in USA quality assurance Rock Tumbler Media Grit Refill, Pre-Polish 500 Silicon Carbide Grit, Stage 3 for Tumbling Stones (2 Pack) (1 lb.)

**Brand:** polly plastics
**Price:** ₨20484
**Availability:** ✅ In Stock

## Summary

> 💎 Elevate your rock tumbling game—because your stones deserve the spotlight!

## Quick Answers

- **What is this?** Rock Tumbler Media Grit Refill, Pre-Polish 500 Silicon Carbide Grit, Stage 3 for Tumbling Stones (2 Pack) (1 lb.) by polly plastics
- **How much does it cost?** ₨20484 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/109104746-rock-tumbler-media-grit-refill-pre-polish-500-silicon-carbide)

## Best For

- polly plastics enthusiasts

## Why This Product

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

## Key Features

- • **Mess-Free Storage:** Durable, reusable jars keep your grit fresh and spills at bay, so your workspace stays pristine.
- • **Fits Every Tumbler:** Seamlessly compatible with all major rock tumblers—Elenco, Lortone, Smithsonian, and more—no guesswork needed.
- • **Stage 3 Perfection:** Achieve flawless pre-polish results with 500 silicon carbide grit, the essential step before the final shine.
- • **Beginner to Pro Ready:** Backed by a 100% satisfaction guarantee, perfect for hobbyists and serious collectors alike.
- • **American-Made Excellence:** Crafted in the USA with premium sourced materials for unmatched purity and performance.

## Overview

Polly Plastics Rock Tumbler Media Grit Refill offers 1 lb. of premium 500 silicon carbide pre-polish grit, designed as Stage 3 in a 4-step tumbling process. Compatible with all major rock tumblers, it comes in reusable jars to prevent spills and ensure longevity. Made in the USA with high-quality materials, this grit guarantees superior polishing results and is ideal for both beginners and experienced hobbyists.

## Description

Buy Polly Plastics Rock Tumbler Media Grit Refill, Pre-Polish 500 Silicon Carbide Grit, Stage 3 for Tumbling Stones (2 Pack) (1 lb.): Tumbling Media - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Does a good job, touching up knives! - Quality stuff, delivery was fast !
Review: Pure Aluminum Oxide - Better than other brands - I get an excellent polish with this 1200 grit. Rocks come out way shinier than when using other polish brands. For instance the Rockshed 1000 grit results in dull rocks in comparison. The Rockshed grit color is gray and under a high powered microscope you can see contamination, black particles, which make the overall color of the grit gray. Aluminum oxide, with high purity, should be white.

## Features

- STAGE 3 OF 4 STEP ROCK TUMBLING MEDIA GRIT – Two 1/2 lb. jars of Stage 3 media grit for transforming rocks and gemstones into beautiful treasures. Contains a total of 1 lb. Pre-polish 500 Grit.
- COMPATIBLE WITH ALL TUMBLERS - Our universal grit is designed for any rock tumbler. Elenco, Lortone, National Geographic, Smithsonian, Thumler and more!
- SUPERIOR PACKAGING - Packaged in durable, re-usable jars to prevent messy spills and to safely store unused product for later.
- MADE IN THE USA – Polly Plastics is an American company with American sourced materials for superior quality control and reduced risk of contaminants.
- BEGINNER FRIENDLY - 100% satisfaction guarantee on all our products.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07P4XBFLF |
| Best Sellers Rank | #7,892 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #4 in Tumbling Media |
| Brand | Polly Plastics |
| Customer Reviews | 4.7 4.7 out of 5 stars (2,492) |
| Grit Number | 500 |
| Item Weight | 8 ounces |
| Item dimensions L x W x H | 6 x 6 x 1.5 inches |
| Item model number | 3405246817 |
| Manufacturer | Polly Plastics |
| Manufacturer recommended age | 12 years and up |
| Material | silicone carbide |
| Product Dimensions | 6 x 6 x 1.5 inches |

## Product Details

- **Brand:** Polly Plastics
- **Grit Number:** 500
- **Item Weight:** 226.8 Grams
- **Item dimensions L x W x H:** 6 x 6 x 1.5 inches
- **Material:** silicone carbide

## Images

![Rock Tumbler Media Grit Refill, Pre-Polish 500 Silicon Carbide Grit, Stage 3 for Tumbling Stones (2 Pack) (1 lb.) - Image 1](https://m.media-amazon.com/images/I/71Walz6JPXL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Does a good job, touching up knives!
*by M***D on February 8, 2026*

Quality stuff, delivery was fast !

### ⭐⭐⭐⭐⭐ Pure Aluminum Oxide - Better than other brands
*by B***5 on January 24, 2026*

I get an excellent polish with this 1200 grit. Rocks come out way shinier than when using other polish brands. For instance the Rockshed 1000 grit results in dull rocks in comparison. The Rockshed grit color is gray and under a high powered microscope you can see contamination, black particles, which make the overall color of the grit gray. Aluminum oxide, with high purity, should be white.

### ⭐⭐⭐⭐⭐ Newbie: Still learning
*by A***Y on August 10, 2020*

So I am new to rock tumbling, I just got my first hobby kit ever for my birthday in June (National Geographic Rock tumbler for those interested) the kit only came with so much grit and being as Ive collected a lot of rocks in the last however many years, I ran out fast. So I went to Polly Plastics to find some well priced and well working grit. Well it came SUPER fast. When I ordered on Friday it was estimated that I would receive my product by the following Wednesday, but I received it on Sunday. It was expertly packaged, you could tell that care went into me receiving my grit. Not only were the two one pound bags of grit in some heavy duty zipper sealed bags, but they were inside another zipper sealed bag, then wrapped in plastic. If these bags had leaked at all it wouldn’t have gone anywhere! Luckily they didn’t leak and I was able to get all my grit into the jar I use to keep it in. I’ll update in a few days to let you know the quality of the grind as my rocks are now currently in and being tumbled. Update: I took my rocks out of my tumbler today. For all those who would like to know my tumbler is a little 3 pound tumbler. Everything I have read says that you need to add two tablespoons of grit. When I pulled my rocks out today there was SO much extra grit that it had created a nearly cement layer at the bottom of my tumbler that took several washes in order to clear out the grit and get all my rocks out. Most of them were smooth enough to move on to the next phase. The grit is very shiny, almost metallic. I’ll update in a few more days, I put only one tablespoon in for this round. Update: Just pulled the batch out that had only one tablespoon of grit in it and it worked beautifully, it seems that for my 3 lb. hobby tumbler one tablespoon of this grit is plenty. I have attached a picture of my rocks that are ready to go on to phase 2.

## Frequently Bought Together

- Polly Plastics Rock Tumbler Media Grit Refill, Pre-Polish 500 Silicon Carbide Grit, Stage 3 for Tumbling Stones (2 Pack) (1 lb.)
- 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
- 5 lbs Rock Tumbler Grit Step 1 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 Sri Lanka*
*Store origin: LK*
*Last updated: 2026-03-22*