National Geographic Hobby Rock Tumbler Kit for Kids and Adults Ages 8+
- 4 polishing grits, rough gemstones
- Ages 8 and up, STEM geology kit
- 5.1 pounds, plastic
- 13.81 x 4.88 x 8.06 inches
- No warranty
Last refreshed Oct 2, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A hobby rock tumbling kit with rough gemstones and four grits for kids and adults, but with little setup detail in the listing. It has no warranty.
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ASIN: B01LQCIL88Category: Rock Tumblers
Overview
Hobbyists get a plastic-bodied tumbler packed with raw stones and a set of polishing stages. The kit is aimed at geology and STEM interest across ages.
The complete kit lets a beginner start polishing rocks without sourcing grit. The listing gives no barrel size, stone quantity or setup steps, and it carries no warranty.
Who it's for
A child or adult with a table and patience for several stages of polishing is the fit. Serious rock hounds wanting a bigger machine should look elsewhere.
Pros and cons
- Complete kit with gemstones
- Four grits for staged polishing
- Suited to kids and adults
- STEM geology learning
- Barrel size not listed
- Stone quantity not listed
- Power source not listed
Performance notes
Polishing proceeds through stages of grit, so a longer run at each stage gives smoother stones. Barrel size and stone load, which the listing does not give, govern batch quality.
Specifications
| Brand | Blue Marble |
|---|---|
| Dimensions & fit | |
| Dimensions | 13.81 x 4.88 x 8.06 inches |
| Weight | 5.1 pounds |
| Construction & materials | |
| Material | Plastic |
| Included components | |
| In the box | Complete rock tumbling kit, rough gemstones, 4 polishing grits |
| Warranty & support | |
| Warranty | No warranty |
| Other details | |
| Educational objective | STEM |
| Recommended age | 8 years and up |
| Theme | Rock tumbling |
Frequently asked questions
How do I install and set up the National Geographic hobby rock tumbler?
The listing gives no setup steps. It lists the tumbler as a complete kit with rough gemstones and 4 polishing grits.
What comes with the National Geographic hobby rock tumbler?
A complete rock tumbling kit with rough gemstones and 4 polishing grits.
What age is the National Geographic hobby rock tumbler for?
The listing says ages 8 and up.