National Geographic Grit Refill for Rock Tumbler - Works with National Geographic

National Geographic Grit Refill for Rock Tumbler - Works with National Geographic

Q: How many oz is in each container?

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?

I would go through Amazon to get an answer for your problem.

Q: Can it be used together ?

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?

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.

Product ID: 119836792

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📦3+ lbs bulk grit for up to 20 lbs rocks

🔄Universal compatibility with all tumblers

⚙️4-stage silicon carbide grit system

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

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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

Description

✨ Transform Rough Rocks into Polished Masterpieces ⚙️

BULK SUPPLY FOR BIG PROJECTS - Over 3 pounds of premium grit lets you polish up to 20 lbs of stones, gems, or glass—perfect for serious hobbyists.
AWARD WINNING STEM INNOVATION - Backed by National Geographic’s legacy and Toy of the Year-winning design, fueling creativity and scientific curiosity.
PRECISION POLISHING IN 4 STAGES - From rough shaping to mirror finish, each grit stage is engineered for flawless rock transformation.
SMART STORAGE EASY MEASUREMENT - Wide-mouth, screw-top containers plus a 10 mL scoop ensure no grit goes to waste and clutter stays minimal.
UNIVERSAL FIT NATIONAL GEOGRAPHIC QUALITY - Works seamlessly with any rock tumbler, optimized for National Geographic tumblers for best results.

The National Geographic Grit Refill is a premium 4-stage silicon carbide grit kit designed to polish up to 20 lbs of rocks, gems, and glass. Compatible with all rock tumblers and optimized for National Geographic models, it includes over 3 pounds of grit, a precision 10 mL scoop, and secure storage containers. This award-winning STEM product combines quality, ease of use, and educational value to elevate your rock tumbling experience.

Specifications

Educational Objective(s)	STEM
Language:	English
Model Number	NGBULKGRIT
Number of Game Players	1
Assembly Required	No
Batteries Required	No
Batteries Included	No
Material Type(s)	quartz glass carbide
Remote Control Included?	No
Colour	white
Product Dimensions	13.97 x 13.97 x 10.8 cm; 1.78 kg
Item model number	NGBULKGRIT
Manufacturer	National Geographic
Item Weight	1 kg 780 g

Have a Question? See What Others Asked

How many oz is in each container?

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?

Can it be used together ?

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?

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