Is there any chance of the tumbler causing a fire if left on? For example if i went out would the tumbler be safe to leave on?

tumbler has been left on for the day when i've gone to wrok, multiple times. Never caused me an issue. Motor shouldn't generate enough heat friction to start a fire, and electrics shouldn't cause an issue because the fuse would tirp out the electrics

How loud is it? Compare to something?

The volume of noise will depend on many variable, but the decibel range will be 80-88. You can find many decibel charts online. But for comparison this is in the range of a hair drier and truck level.

can it Polish sea glass

Absolutely. We have tested various pieces of glass and it cone out looking really good.

Our Pro tumbler has a watts power output of 13 watts at max efficiency, the starter would be under this max.

Deliver to Finland

For best experience Get the App

DOWNLOAD THE APP

WE SOURCE ITEMS FROM

UAE
UK
India
USA
Japan
KOREA

Customer Services

About Us

Customer Support

NATIONAL GEOGRAPHIC Starter Rock Tumbler Kit - Complete Rock Polisher Kit, Durable Leak-Proof Tumbler, 227 Grams of Rocks, Grit, 5 Jewellery Fastenings

NATIONAL GEOGRAPHIC Starter Rock Tumbler Kit - Complete Rock Polisher Kit, Durable Leak-Proof Tumbler, 227 Grams of Rocks, Grit, 5 Jewellery Fastenings

Product ID: 47945287

Secure Transaction

Details

Size
1 Count (Pack
Brand
Blue Marble
Theme
Geology - Rock
Age range (description)
8 years and up
Item dimensions L x W x H
27.9 x 13.2 x

💎227g rough rocks with 9 gemstone types

⚙️Durable motor for multiple batches

🛡️Leak-proof, rubber-lined barrel

Description

💎 Turn rough into remarkable—your personal gem studio awaits!

BUILT TO ENDURE - Robust motor and leak-proof design for nonstop tumbling
SILENT STEADY - Rubber-lined barrel ensures quieter operation on a sturdy base
POLISH LIKE A PRO - Transform raw stones into dazzling gems with ease
LEARN WHILE YOU CREATE - Step-by-step guide plus fascinating geology facts for curious minds
COMPLETE GEM MAKING KIT - Includes rocks, 4-stage grit, and 5 jewelry fastenings—everything you need

The NATIONAL GEOGRAPHIC Starter Rock Tumbler Kit is a durable, leak-proof rock polisher designed for hobbyists and learners aged 8+. It includes 227 grams of rough rocks featuring 9 gemstone varieties, a 4-stage polishing grit system, and 5 jewelry fastenings. With a quiet rubber-lined barrel and a robust motor, this all-in-one kit offers an educational, hands-on experience in geology and gem crafting.

Specifications

Product Dimensions	27.9 x 13.2 x 30.48 cm; 1.9 kg
Manufacturer recommended age	8 years and up
Item model number	NGTUMBLER2
Educational Objective(s)	Geology, Process Understanding, Critical Thinking, Scientific Inquiry
Language:	German
Number of pieces	30
Assembly Required	No
Batteries Required?	No
Batteries included?	No
Material Type(s)	Metal, Rubber Lined Barrel
Remote Control Included?	No
Radio Control Suitability	Rock Tumbling for Hobbists
Colour	Black, Yellow
ASIN	B01I56RV0C