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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 & Tumbler Supplies

NATIONAL GEOGRAPHIC Rock Tumbler Grit and Polish Refill Kit - Tumbling Grit Media, Polish Up to 20 lbs. of Rocks, Works with any Rock Polisher & Tumbler Supplies

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: 37710951

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🔄universal compatibility with all tumblers

🪨polishes up to 20 lbs of rocks

⚙️4-stage precision 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

National Geographic Rock Tumbler Kit – Hobby Edition Includes Rough Gemstones, and 4 Polishing Grits, Great STEM Science Kit for Geology Enthusiasts, Rock Polisher for Kids and Adults

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 your stones into museum-worthy gems—don’t just polish, perfect!

UNIVERSAL FIT - Seamlessly works with any rock tumbler, maximizing your creative freedom.
HEAVY DUTY CAPACITY - Refill kit handles up to 20 lbs of stones, gems, and glass—bulk polish like a pro.
4 STAGE GRIT MASTERY - From rough shaping to mirror polish, every step engineered for perfection.
AWARD WINNING QUALITY - Crafted by Blue Marble, Toy of the Year winner, blending education with premium performance.
SECURE CONVENIENT STORAGE - Wide-mouth, screw-top containers keep grit fresh and easy to measure.

The National Geographic Rock Tumbler Grit and Polish Refill Kit offers a complete 4-stage silicon carbide grit system designed to polish up to 20 lbs of rocks, gems, and glass. Compatible with all rock tumblers, it features easy-to-use, securely packaged grit containers and is developed by Blue Marble, an award-winning educational brand.

Specifications

Item Weight	1.78 Kilograms
Item Dimensions	5.5 x 5.5 x 4.25 inches
Size	Medium
Material Type	Carbide, Abrasive, Grit, Silicone
Color	Black
Theme	Science
Operation Mode	Manual
Educational Objective	Learn About Rock Tumbling
Number of Players	1

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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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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