What is the power consumption of this unit over a week of continuous use? (in usa on 110v). thank you.

This takes .3 Amps, so (watts = amps x volts) OR watts = .3 x 110 which equals33 watts. Now for one week would equal 33 watts x 7 days x 24 hours =5544 watts or 5.54 kilowatts for one week.At $.16 per kilowatt it comes to $.89 per week.

What the difference between this and the starter kit?

There are two main differences:The Hobby Rock Tumbler has a rubber tumbling barrel with a stainless steel cap, which reduces noise and is more durable. The Starter Kit Rock Tumbler has a plastic barrel. The Hobby Rock Tumbler also has a keypad for setting the number of days you would like it to tumble, where as the Starter Kit Rock Tumbler's setting options are on/off. Thank you for your inquiry.

What pound tumbler is this product?

Dearest National Geographic.... why would you only send 1# of rocks with a two pound tumbler?

Can i buy extra grit without the rocks. we have many rocks from "mining" gemstones that i would love to polish. what do you recommend?

I recommend you follow the rock tumbler hobbiest MIchigan Rocks on Youtube. He's a good wealth of information for anyone getting into rock tumblers. He and other's mention that the polish from National Geographic is not good. I would go with rock tumbler polish offered by Polly Plastics.

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

National Geographic Hobby Rock Tumbler Kit – Durable Leak-Proof Rock Polisher with 7-Day Timer, Complete Rock Tumbling Kit with Grit, Jewelry Settings & GemFoam Polish, Educational STEM Science Kit

Product ID: 222772348

Details

Brand
Blue Marble
Age Range (Description)
8 years and up
Color
Multicolor
Theme
Geology
Item dimensions L x W x H
13.11 x 5 x

⏳7-day programmable timer

💎GemFoam polish for dazzling shine

🔒leak-proof stainless steel barrel

$178.24

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

Secure transaction

Description

💎 Turn rough rocks into polished gems—and your workspace into a creative lab!

BUILT TO ENDURE - Durable motor and leak-proof barrel ensure long-lasting, mess-free polishing
NEXT LEVEL SHINE - Innovative reusable GemFoam polish delivers museum-quality gemstone brilliance
STEM MEETS STYLE - Award-winning educational kit that fuels creativity and scientific curiosity
ALL IN ONE GEM LAB - Includes 1/2 lb rough rocks, 9 gemstone types, grit, jewelry settings & strainer
SET IT FORGET IT - 7-day timer with speed control lets you multitask like a pro

The National Geographic Hobby Rock Tumbler Kit is a durable, leak-proof rock polisher featuring a 7-day timer and speed control. This all-inclusive STEM kit includes 1/2 pound of rough rocks with nine gemstone varieties, tumbler grit, jewelry fastenings, a strainer, and the innovative GemFoam polish for a brilliant finish. Designed for ages 8+, it combines educational value with hands-on creativity, backed by an award-winning brand.

Specifications

ASIN	B086Z6ZB7R
Age Range Description	8 years and up
Best Sellers Rank	#1,502 in Toys & Games ( See Top 100 in Toys & Games ) #137 in Educational Science Kits
Brand Name	Blue Marble
Customer Reviews	4.4 4.4 out of 5 stars (3,723)
Educational Objective	STEM
Included Components	Complete Rock Tumbling Kit
Is Assembly Required	No
Item Dimensions	13.11 x 5 x 8.15 inches
Item Type Name	Hobby Rock Tumbler Kit
Item Weight	1.9 Kilograms
Language	English
Manufacturer	JMW Sales, Inc.
Manufacturer Maximum Age (MONTHS)	1188
Manufacturer Minimum Age (MONTHS)	96
Manufacturer Part Number	NGHOBBYTUMBLER2
Material Type	Plastic
Model Number	NGHOBBYTUMBLER2
Set Name	Rock Tumbler Kit
Size	One Size
Sub Brand	National Geographic
Theme	Geology
UPC	816448028830
Unit Count	1.0 Count

Common Questions

Are the products genuine and authentic?+

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.

How long does delivery take and is it reliable?+

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.

What is Desertcart? Is it safe to order from?+

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.

How is product pricing calculated?+

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.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

$178.24

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago

View all Trustpilot reviews