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 – 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

🔒leak-proof stainless steel lid

🪨9 gemstone varieties included

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VT31656

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Description

💎 Turn rough rocks into polished gems—and your creativity into a lifestyle statement!

BUILT TO ENDURE - Durable motor and leak-proof barrel ensure your rock tumbling journey never stops.
STEM MEETS STYLE - Educational kit that transforms geology into dazzling, wearable art—perfect for curious minds and creative pros.
ALL IN ONE GEM LAB - Comes complete with rough stones, tumbler grit, jewelry fastenings, and innovative GemFoam polish.
AWARD WINNING TRUST - From the Toy Association’s Toy of the Year winner, backed by responsive US-based support.
SET FORGET PRECISION - 7-day timer with speed control lets you multitask while your gems get flawless polish.

The National Geographic Hobby Rock Tumbler Kit is a durable, leak-proof rock polisher featuring a 7-day timer and speed control. It includes 1/2 pound of rough stones with nine gemstone types, tumbler grit, jewelry fastenings, and the innovative reusable GemFoam polish for a brilliant shine. Designed for ages 8+, this STEM-focused kit combines education with hands-on creativity, supported by award-winning customer service.

Specifications

ASIN	B086Z6ZB7R
Age Range Description	8 years and up
Best Sellers Rank	#2,885 in Toys & Games ( See Top 100 in Toys & Games ) #246 in Educational Science Kits
Brand Name	Blue Marble
Customer Reviews	4.4 4.4 out of 5 stars (3,693)
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

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VT31656

Duties & taxes included

In stock

Sold byAmazon VanuatuDelivered 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 Vanuatu.

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