All our tumblers include a 1-2 year warranty. For warranty assistance please contact us using the contact information found on the bottom of the package or in the instruction guide.

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NATIONAL GEOGRAPHIC Rock Tumbler Kit - 3LB Extra Large Capacity, 3LB Rough Gemstones, 4 Polishing Grits, Jewelry Fastenings, Great STEM Science Kit for Boys and Girls

NATIONAL GEOGRAPHIC Rock Tumbler Kit - 3LB Extra Large Capacity, 3LB Rough Gemstones, 4 Polishing Grits, Jewelry Fastenings, Great STEM Science Kit for Boys and Girls

Q: Why is it saying undeliverable to any of my US addresses?

I experienced the same; it would not ship to my po box. I had it shipped to my daughter's house; it seem to like her address.

Q: What are the inside measurements of the 3lb barrel?

Our 3 lb barrel is approximately 3.25" x 5.5"

Q: How much does the barrel weigh?

Our 3 pound barrel with lid weighs 2 pounds.

Product ID: 344915911

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Details

Size
One Size
Brand
Blue Marble
Theme
Geology
Age Range (Description)
8 years and up
Item dimensions L x W x H
32.4 x 26.2 x

🔇75% quieter stainless steel barrel

⏲️Automatic shutoff timer

⚙️3LB extra-large capacity

Frequently Bought Together

National Geographic Rock Tumbler Kit - 3 Lb. Extra Large Capacity Barrel with 3-Speed Motor & 9-Day Timer, Kit Includes Rocks for Tumbling and Rock Polisher Grit, Rock Tumbler for Adults and Kids

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 Refill Kit – 1Lb. Gemstones and Rocks for Tumbling including Unpolished Amethyst and Quartz – Rock Tumbler Supplies include Rock Tumbler Grit and Jewelry Accessories

Description

💎 Turn rough rocks into polished treasures — your STEM journey starts here!

SET IT FORGET IT - Customizable time and speed controls with automatic shutoff for perfect tumbling every time.
WHISPER QUIET OPERATION - Enjoy focused creativity with a motor and barrel design that’s 75% quieter than plastic alternatives.
ALL INCLUSIVE STEM EXPERIENCE - Includes 9 gemstone varieties, 4 polishing grits, jewelry fastenings, and innovative reusable GemFoam for a professional shine.
AWARD WINNING EDUCATIONAL FUN - Backed by the Toy Association’s Toy of the Year winner, fostering creativity, critical thinking, and hands-on learning.
MASTER THE ART OF GEM POLISHING - Turn 3 lbs of rough stones into dazzling gems with ease and precision.

The NATIONAL GEOGRAPHIC Rock Tumbler Kit offers a professional-grade, 3-pound capacity tumbler with a durable, noise-reducing stainless steel barrel and automatic shutoff timer. It includes 3 lbs of diverse rough gemstones, four stages of polishing grit, jewelry fastenings, and the innovative reusable GemFoam polisher. Designed for ages 8+, this award-winning STEM kit combines hands-on science, creativity, and jewelry making in one complete package.

Specifications

Educational Objective(s)	STEM, Concept Development Skills, Hand-Eye Coordination, Critical Thinking, Reasoning Exploratory Skills
Language:	English
Model Number	NGTUMBLER3LB
Number of Game Players	1
Assembly Required	No
Batteries Required	Yes
Batteries Included	No
Material Type(s)	Plastic Stainless Steel
Remote Control Included?	No
Product Dimensions	32.4 x 26.2 x 17 cm; 3.7 kg
Item model number	NGTUMBLER3LB
Manufacturer recommended age	8 years and up
Manufacturer	JMW Sales, Inc.
Item Weight	3 kg 700 g

Have a Question? See What Others Asked

Warranty on motor

Why is it saying undeliverable to any of my US addresses?

What are the inside measurements of the 3lb barrel?

How much does the barrel weigh?

Common Questions

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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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Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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