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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Hobby Rock Tumbler Kit – Durable Leak-Proof Rock Polisher with 7-Day Timer – Complete Rock Tumbling Kit – Geology Hobby for Kids, Educational STEM Science Kit, Rock Collection

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

$227.79

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Description

💎 Turn rough stones into polished treasures — your personal gem factory awaits!

BUILT TO ENDURE - Durable motor and leak-proof barrel with stainless steel lid for mess-free polishing
NEXT LEVEL SHINE - Innovative reusable GemFoam foam delivers professional-grade gemstone brilliance
STEM MEETS STYLE - Award-winning kit that sparks creativity and geology passion for ages 8+
ALL IN ONE GEM LAB - Includes 1/2 lb rough rocks, 4-stage grit, GemFoam polish, and jewelry fastenings
SET IT FORGET IT - 7-day timer with adjustable speed for effortless tumbling sessions

The National Geographic Hobby Rock Tumbler Kit is a durable, beginner-friendly rock polishing system featuring a 7-day timer, leak-proof stainless steel barrel, and an exclusive GemFoam polishing foam. Designed for kids and adults, it includes rough gemstones, multi-stage grit, and jewelry fastenings, making it a complete STEM-focused hobby kit that transforms raw rocks into dazzling gems with ease.

Specifications

ASIN	B086Z6ZB7R
Age Range Description	8 years and up
Best Sellers Rank	#1,695 in Toys & Games ( See Top 100 in Toys & Games ) #220 in Educational Science Kits
Brand Name	Blue Marble
Customer Reviews	4.4 out of 5 stars 3,747 Reviews
Educational Objective	STEM
Included Components	Complete Rock Tumbling Kit
Item Dimensions	13.11 x 5 x 8.15 inches
Item Highlight	Leak-Proof Barrel, 7-Day Timer, Rough Gemstones, 4-Stage Grit, GemFoam Polish, Jewelry Settings, Geology Hobby
Item Type Name	Hobby Rock Tumbler Kit
Item Weight	1.9 kg
Language	English
Manufacturer	JMW Sales, Inc.
Manufacturer Part Number	NGHOBBYTUMBLER2
Manufacturer recommended age	8 years and up
Material Type	Plastic
Model Number	NGHOBBYTUMBLER2
Number of Items	1
Number of Packs	1
Set Name	Rock Tumbler Kit
Size	One Size
Sub Brand	National Geographic
Theme	Earth Science
UPC	816448028830
Unit Count	1 Count

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