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 for Kids and Adults Ages 8+ | Rough Gemstones, 4 Polishing Grits, Rock Polisher, Geology Science Kit, Rock Tumbling for Kids and Adults, Birthday Gift

Product ID: 34238823

🔇75% quieter leakproof barrel

🔬STEM-focused educational kit

⚙️Durable motor, built to last

184160CFA

Duties & taxes included

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💎 Turn your curiosity into sparkling reality!

SET FORGET TIMER - One-touch timer with automatic shutoff for hassle-free tumbling cycles
AWARD WINNING STEM FUN - From the Toy of the Year winner, inspiring creativity for ages 8+
COMPLETE ALL IN ONE KIT - Includes tumbler, 9 rough gemstones, sifter, and full-color STEM guide
WHISPER QUIET OPERATION - Enjoy focused creativity with a motor 75% quieter than competitors
TRANSFORM ROUGH ROCKS INTO DAZZLING GEMS - Effortlessly polish stones with 4-step grit system for professional shine

The National Geographic Hobby Rock Tumbler Kit is a durable, quiet, and easy-to-use STEM activity designed for kids and adults 8+. It includes a high-quality motorized tumbler, four polishing grits, nine types of rough gemstones, and a detailed educational guide, making it the perfect all-in-one kit to transform ordinary rocks into polished gems while fostering creativity and scientific learning.

Specifications

ASIN	B01LQCIL88
Age Range Description	8 years and up
Best Sellers Rank	#1,155 in Toys & Games ( See Top 100 in Toys & Games ) #1 in Kids' Rock Tumblers
Brand Name	Blue Marble
Customer Reviews	4.5 4.5 out of 5 stars (25,877)
Educational Objective	STEM
Global Trade Identification Number	00816448020421
Included Components	Complete Rock Tumbling Kit
Item Dimensions	13.81 x 4.88 x 8.06 inches
Item Type Name	Rock Tumbler Kit – Hobby Edition
Item Weight	2.3 kg
Manufacturer	JMW Sales, Inc
Manufacturer Maximum Age (MONTHS)	1188
Manufacturer Minimum Age (MONTHS)	96
Manufacturer Part Number	NGHOBBYTUMBLER
Manufacturer Warranty Description	No Warranty
Material Type	Plastic
Model Number	NGHOBBYTUMBLER
Set Name	Hobby
Size	One Size
Sub Brand	National Geographic
Theme	Rock Tumbling
UPC	816448020421
Unit Count	1 Count

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184160CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered 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 Senegal.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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