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.

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National Geographic Hobby Rock Tumbler Kit with 7-Day Timer and Grit

Product ID: 243528911

Details

Age range (description)
8 years and up
Brand
Blue Marble
Item dimensions L x W x H
33.3 x 12.7 x
Size
13.86 x 5.04 x
Theme
Geology

💎Includes 9 gemstone types + GemFoam polisher

🔇75% quieter leak-proof barrel

⚙️Durable motor with timer control

R4424

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💎 Polish your passion, rock your world!

COMPLETE ALL IN ONE KIT - Everything you need included—227g of rough stones, 4-stage grit, jewelry fastenings, strainer, and innovative GemFoam.
WHISPER QUIET OPERATION - Enjoy a noise-reduced barrel that’s 75% quieter than typical plastic models—perfect for home or office.
EFFORTLESS GEMSTONE CREATION - Transform rough rocks into dazzling polished gems with simple, set-and-forget tumbling.
NEXT LEVEL SHINE WITH GEM FOAM - Add the reusable GemFoam polisher for a brilliant, museum-quality finish that stands out.
STEM APPROVED FUN FOR ALL AGES - Engage creativity and geology skills with a trusted National Geographic STEM kit designed for ages 8+.

The National Geographic Hobby Rock Tumbler Kit is a durable, noise-reduced rock polisher designed for kids and adults. Featuring a robust motor with timer control, a leak-proof stainless steel lid barrel that operates 75% quieter than plastic alternatives, and an all-inclusive kit with 227 grams of rough rocks, 9 gemstone varieties, tumbler grit, jewelry fastenings, and the innovative reusable GemFoam polisher for a brilliant finish. Ideal for STEM learning and creative exploration, this kit makes gemstone crafting accessible and fun.

Specifications

ASIN	B086Z6ZB7R
Age Range Description	8 years and up
Battery Description	Not required (mains powered)
Best Sellers Rank	13,780 in Toys & Games ( See Top 100 in Toys & Games ) 210 in Educational Science Kits
Brand Name	Blue Marble
Country Of Origin	China
Customer Reviews	4.2 4.2 out of 5 stars (3,696)
Educational Objective	Geology and Creative Thinking
Included Components	1 Professional Rock Tumbler, 227 grams of rough rocks with nine different types of gemstones inside, 5 jewelry fastenings, 4-stage tumbler grit, Strainer, new GemFoam rock polisher
Is Assembly Required	No
Item Dimensions	33.3 x 12.7 x 20.7 centimetres
Item Highlight	Noise-Reduced Barrel, 7-Day Timer, Rough Gemstones, Grit and GemFoam Polish, Rock Polishing, Geology Hobby
Item Type Name	Hobby Rock Tumbler Kit - Rock Polisher for Kids & Adults
Item Weight	1.9 Kilograms
Language	English
Manufacturer	JMW Sales, Inc.
Manufacturer Part Number	NGHOBBYTUMBLER2
Manufacturer Warranty Description	No Warranty
Manufacturer recommended age	8 - 10 years
Material Type	default_no_selection_value
Model Number	NGHOBBYTUMBLER2
Number of Items	1
Number of Packs	1
Set Name	Hobby Rock Tumbler Kit
Size	13.86 x 5.04 x 8.15 inches
Sub Brand	National Geographic
Theme	Geology
UPC	816448028830
Unit Count	1.0 count

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