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🪨 Transform your rocks from rough to remarkable — polish like a pro!
The NATIONAL GEOGRAPHIC Rock Tumbler Grit is a premium 4-stage silicon carbide polishing media set designed to refine and polish up to 4.5kg of rocks, gems, and glass. Compatible with all tumblers and packaged for easy use and storage, it offers a professional-grade finish while promoting hands-on geological learning for ages 8 and up.
| ASIN | B01MRKI4W0 |
| Age Range Description | 8 years and up |
| Best Sellers Rank | 96,826 in Toys & Games ( See Top 100 in Toys & Games ) 1,035 in Educational Science Kits |
| Brand Name | Blue Marble |
| Colour | Black |
| Customer Reviews | 4.6 out of 5 stars 14,024 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. |
| Manufacturer recommended age | 8 years and up |
| Material Type | Carbide of Silicon |
| Model Number | NGBULKGRIT |
| Number of Packs | 1 |
| 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 |
K**M
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!
A**R
Do the job well
I was a bit concerned by some of the negative comments but am so glad I went ahead and bought the product. It works very well and I will buy again.
R**T
Good product
Really satisfied with the product. I'm still learning but for now it's doing fine.
M**S
Keep on tumbling...
Great quality grinding materials - to extend your rock tumbler's life beyond the 'one off' use of the set of sachets that you get with the kits... very economical - perhaps a whole year's worth of tumbling with this amount of 'dust'... happy tumbling!
C**T
Perfect!
Perfect for a rock tumbler machine.
S**Y
As described!
Bought this for my Daughter (Age 13) who found the grit perfect for what she was doing.
L**E
A Little Gem!
Bought for grandson's 9th birthday and he loves it! He found it simple to use. Just 3 days in operation so far but no leaks at all. Makes a noise during tumbling but not as much as we expected - however its permanent 'home is likely to be the garage. Amazing the difference already with the stones that have been tumbled thus far - deposits that were not visible originally are now showing. A really good opportunity to learn about geology and there is the craft application too.
L**S
Works
Handy tubs & spoon Work well all labelled & numbered
F**M
Helps Poshing
It helps shaping stones too..it is a little sound and I'm living 2floor so I put a box on it to make the noise more silent
J**M
Scheint gut zu funktionieren
Artikel wie beschrieben, gute Transportverpackung, gerne wieder
A**X
Muy satisfecha
El proceso de pulir piedras es algo largo, pero el producto hace su labor. Viene suficiente cantidad para varias tandas y es muy sencillo de usar, ya que cada paso esta numerado.
V**Z
Good product
As advertised
C**N
Très bien
C'est un petit investissement, j'aurai aimé pouvoir acheter pot par pot car je n'utilise que le n°1 et n°3, mais ça reste très efficace, bon rapport quantité/qualité/prix. Et une seule cuillère c'est dommage car il reste toujours un peu de poudre quand on la vide donc on contamine un petit peu les autres pots... Mais ce n'est qu'un détail.
Trustpilot
3 weeks ago
1 week ago