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.

National Geographic Hobby Rock Tumbler Kit For Kids And Adults

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💎 Polish your passion, rock your world!

SET IT AND FORGET IT - One-touch timer with automatic shutoff makes tumbling effortless.
AWARD WINNING QUALITY - From the Toy of the Year winner, trusted for inspiring imagination.
WHISPER QUIET OPERATION - Enjoy a 75% noise reduction for peaceful creativity.
COMPLETE STEM LEARNING KIT - Includes 9 real rough gemstones and a full-color guide for immersive education.
TRANSFORM ROUGH ROCKS INTO DAZZLING GEMS - Turn everyday stones into polished treasures with ease.

The National Geographic Hobby Rock Tumbler Kit is a durable, quiet, and easy-to-use STEM activity designed for kids 8+ and adults. It includes a high-quality motorized tumbler, four polishing grits, nine types of rough gemstones, and a detailed learning guide, enabling users to transform rough stones into sparkling gems. Recognized for educational value and awarded Toy of the Year, this kit combines fun, science, and creativity in one complete package.

Specifications

ASIN	B01LQCIL88
Age Range Description	8 years and up
Best Sellers Rank	#2,099 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 (25,883)
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	5.1 pounds
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
Number of Items	1
Number of Packs	1
Set Name	Hobby
Size	One Size
Sub Brand	National Geographic
Theme	Rock Tumbling
UPC	816448020421
Unit Count	1 Count

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