what is the warranty for and how long is it?

I don’t think there is a warranty for it. However, if it’s defective call the company. They seem to be really good at doing the right thing

Can you confirm the voltage rating of the power cord? only 110v or up to 240v? thank you.

The power supply will work with 100-240v. It has a US plug.

Mine didn't come with an instruction booklet. Where can i find one online or request one?

Contact Amazon or the Seller about getting a booklet. As for online guidance, doing a quick google search on how to use a rock tumbler will help. You can also put your tumbler info into youtube and see someone setting it up and using it. A quick search of Amazon shows several books on rock tumbling as well as gemstone/rock identification.

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Advanced Professional Rock Tumbler Kit - with Digital 9-day timer & 3-speed polisher settings - UK/EU Edition Turn Rough Rocks into Beautiful Gems : Great Geology Science Kit STEM Gift for all ages

Product ID: 170464190

Details

Age range (description)
Adult
Brand
Dan&Darci
Item dimensions L x W x H
32.3 x 25.4 x
Size
23 cm x 33 cm
Theme
Geology

⏳9-day digital timer

🪨0.5 lb assorted rough rocks included

⚙️3-speed polisher settings

Description

💎 Turn Rough Rocks into Polished Perfection — Be the Gem Maker Everyone Talks About!

STEM MEETS STYLE - Transform raw stones into stunning gems perfect for jewelry, crafts, or your unique collection.
ALL IN ONE GEM LAB - Complete kit includes tumbler, assorted rocks, grit packets, jewelry fasteners, and a detailed learning guide.
PRECISION TIMING MASTERY - Set it and forget it with a digital 9-day timer for flawless polishing cycles.
CUSTOMIZABLE POLISH POWER - Three-speed settings let you tailor the tumbling process to your rock type and desired finish.
EDUCATIONAL ENTERTAINING - Engage your inner scientist with hands-on geology that’s as fun as it is informative.

The Advanced Professional Rock Tumbler Kit by Dan&Darci is a comprehensive STEM-focused geology set designed for adults and supervised children 8+. Featuring a digital 9-day timer and 3-speed polisher, it enables precise control over the tumbling process. The kit includes a sturdy tumbler, 0.5 lb of assorted rough rocks, four grit packets, jewelry fasteners, a mesh strainer, and an illustrated learning booklet, making it perfect for educational use or creative hobbies. This UK/EU edition offers a professional-grade experience to turn raw stones into beautiful gemstones, ideal for crafting, collecting, or gifting.

Specifications

ASIN	B07Q32W334
Age Range Description	Adult
Best Sellers Rank	167,303 in Toys & Games ( See Top 100 in Toys & Games ) 1,606 in Educational Science Kits
Brand Name	Dan&Darci
Customer Reviews	4.2 4.2 out of 5 stars (9,110)
Educational Objective	Earth sciences, hand-eye coordination, patience
Is Assembly Required	No
Item Dimensions	32.3 x 25.4 x 14.5 centimetres
Manufacturer	Dan&Darci
Manufacturer Part Number	DD-007
Manufacturer recommended age	0 - 10 years
Model Number	Rock Tumbler
Number of Items	1
Number of Packs	1
Set Name	Rock Tumbler Kit
Size	23 cm x 33 cm x 14 cm
Theme	Geology
UPC	855831008158
Unit Count	2.1 count

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