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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

4.8 (13) Write Review
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$23.99

$ 11 .99 $11.99

In Stock

1.Style:Bulk Grit Media


  • 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
  • HIGH QUALITY - This rock polisher grit refill pack comes with enough high-quality silicon carbide grit to put a dazzling polish on up to 20 lbs. of rocks, gems, glass, and more
  • COMPATIBLE WITH ALL TUMBLERS - This complete 4-step rock tumbler grit refill kit works with all rock tumblers. For best results, use with National Geographic Rock Tumblers and rock tumbling supplies.
  • EASY TO MEASURE AND STORE - Designed for ages 14 and up, each rock tumbling grit stage is packaged in a wide-mouth container with secure, screw-top closure.
  • HIGH-QUALITY EDUCATIONAL PRODUCTS - We're proud to make the highest quality hands-on science products, and all are backed by exceptional service. If your experience is less than stellar, let us know and we'll make things right!


Product Description

National Geographic Bulk Polishing Grit for Rock Tumblers

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked.

This rock polisher grit refill pack comes with enough high-quality silicon carbide grit to put a dazzling polish on up to 20 lbs. of rocks, gems, glass & more! The first stage provides initial shaping, the second smooths rock surfaces, the third pre-polishes rocks & fourth provides the final polish.

Keep the fun rolling with National Geographic high-quality grit media!

The National Geographic Rock Tumbling Grit Bulk Pack contains over 3 pounds of rock polishing grit, compatible with any tumbler!

This Kit Includes:

  • 4 Stages of Rock Polishing Grit
  • 1 10 mL Grit Scoop
  • Rock Tumbling Instructions

This four-stage silicon carbide grit for rock tumbling systems is the ideal way to give rough rocks a smooth, polished look. The first rock polishing stage smooths rough edges and provides initial shaping. The second stage smooths the rock surfaces even more. The third stage provides a strong pre-polish, followed by the fourth stage which completes the grit polishing process.

The 10 mL scoop in the grit refill kit ensures accurate grit measurements for every stage, allowing you maximize your grit usage for up to 20 pounds of rocks!

This rock tumbling grit refill pack is compatible with any tumbler on the market, but for best results, use with National Geographic tumblers and rock tumbling supplies, including ceramic media and GemFoam.

We make the highest quality hands-on science products, and all are backed by exceptional service. With a mission to inspire people to care about the planet, the National Geographic Society is one of the world’s largest nonprofit scientific and educational organizations.

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Brian F
2025-09-04 18:45:24
Let me spill the gems on a rock-solid addition to my lapidary adventures – the NATIONAL GEOGRAPHIC Rock Tumbler Grit and Polish Refill Kit. As a self-proclaimed rock enthusiast, this kit has truly rocked my world, giving my gemstones the shine they deserve.What's crystal clear about this refill kit is its top-notch quality. Packed with premium grit and polish, it's like giving your rocks a spa day. Whether I'm polishing up some quartz or tumbling some jasper, this kit ensures that my gemstones shine bright like a diamond.Using the NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit is a gem of an experience. Its easy-to-follow instructions make it a breeze to use, and the results speak for themselves – my stones come out looking so polished, they could rival any jewel in the crown jewels.Since I started using this refill kit, my rock tumbling game has gone from pebble to precious stone. Whether I'm crafting jewelry or just adding some sparkle to my collection, the NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit is my go-to for achieving that rockstar shine.In summary, if you're a rock enthusiast looking to add some sparkle to your collection, the NATIONAL GEOGRAPHIC Rock Tumbler Grit and Polish Refill Kit is a gem of a find. With its top-quality materials and stunning results, it's sure to rock your world.
Kat M
2025-08-22 15:49:48
Lookin good
Marrissa Chester
2025-08-18 10:58:11
I really didn’t know what to expect when I purchased this item but I truly love it. It does the job. It’s way different than I’ve used before. Nothing like I expected. I’m highly impressed.
Michelle Nolan
2025-08-07 16:39:08
We bought these looking for another way to try to get our rocks to shine with a wet look. They make our rocks a little more smooth, but we still can’t figure out how to get the wet look on them. They are reusable, but you need to make sure you keep track of what you used them with or after because you don’t want to add grit to them. I would say they worked okay. The price was decent.
kel
2025-07-13 16:58:40
To clean and smooth rocks, then polish them so I can have jewelry I had wanted in the first place - is so awesome. Years ago I had a small rock polisher and it was noisy and didn't do very good job. This polisher is so much quieter, we can have it in the house and not a far away shed. The rubber of drum, wheels, top are all awesome. Keeps it quiet and with the pellets and sponges, we find most rocks take less time than suggested. We got it in August 2024, and it has ran every day but maybe 2 days sense. Love it
Rowan54
2025-07-02 17:04:20
Added this to the rock tumbler when the rocks sounded like they were falling and clanking instead of rolling and swishing. Sounded much better after. And keep the rocks from breaking and probably help them polish better. (From what I've read.)By the way, this is not a toy. I'm 70, and I've always wanted a rock polisher. I'm using it for real.
Frlnce
2025-06-12 16:29:38
Refill purchased for my granddaughter so she can continue to tumble rocks as what came with the tumbler ran out long ago. Next Christmas I'll probably have to purchase two as I got the tumber for a grandson as well this Christmas.
Haley Hudgins
2025-05-18 10:38:23
the containers are a good size. not huge but will last you a long time, perfect for people that don’t tumble rocks religiously, but more of whenever you remember
Belle geodes
2025-04-17 10:36:14
Beau kit complet et de qualité supérieure
Ray
2025-02-11 18:00:52
This was a gift to go with the rock tumbler that we gave for a birthday gift. Both work great.
Detlef Bruehl
2025-01-25 17:12:44
4 Körnungen für das erfolgreiche Polieren von Steinen. Es funktioniert wirklich… braucht aber Geduld.Die Steine sehen nach 14 Tagen ganz gut aus aber ich denke da muss noch mal eine Woche in der Trommen poliert werden.
Laurie
2025-01-02 20:12:53
Indispensable pour utiliser la polisseuse de mon fils. Il y a de quoi faire pour un moment.
AR
2024-11-22 15:48:09
die Größe ist ok, es reicht für einige Durchgänge in der Steinetrommel