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Description
NATIONAL GEOGRAPHIC Rock Tumbler Kit-3LB Extra Large Capacity, 3LB Rough Gemstones 4 Polishing Grits, Jewelry Fastenings, an Educational STEM Science KitCREATE YOUR OWN GEMSTONES Rock tumbling is a hugely popular hobby for kids and adults! This professional rock tumbler makes it fun and easy to turn rough rocks into beautifully polished gemstones, thanks to its simple operation and durable design. A TUMBLER THAT'S MADE TO LAST The durable motor has time and speed control settings so you can set it, and forget it. An improved, leak proof barrel features a stainless steel lid is 75% quieter overall than
- CREATE YOUR OWN GEMSTONES - Rock tumbling is a hugely popular hobby for kids and adults! This professional rock tumbler makes it fun and easy to turn rough rocks into beautifully polished gemstones, thanks to its simple operation and durable design.
- A TUMBLER THAT'S MADE TO LAST - The durable motor has time and speed control settings so you can set it, and forget it. An improved, leak-proof barrel features a stainless-steel lid is 75% quieter overall than plastic tumbler barrels.
- ALL-IN-ONE TUMBLING KIT - This kit has everything you need and then some! You get three pounds of rough rocks with nine different types of gemstones inside, five jewelry fastenings, grit, a strainer, and our innovative new GemFoam rock polisher.
- USE GEMFOAM FOR DAZZLING RESULTS - This rock tumbler kit stands apart from others thanks to our new, reusable GemFoam rock polisher! Add GemFoam and water to the barrel after your final tumbling stage and your gems will have incredible shine!
- SATISFACTION GUARANTEED – The National Geographic STEM series provides kids high-quality educational toys that are a whole lot of fun! If your experience is anything less than extraordinary, let us know so we can make it right for you.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 16 reviews
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Product Reviews
★★★★★ 4
Nice grinder set
Size: 2.5" x 5.1"
These are a really pretty grinder set. They work well, but after a bit they don't grind as well, and the tops try to come off. They are also NOT dishwasher safe. They will literally melt, even on the top shelf.
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Reviewed in the United States on December 28, 2024
★★★★★ 5
Perfect Size & Price
Size: 2.5" x 5.1", Size: 2.5" x 5.1"
Perfect size! Easy to hold and turn the grinder. Grinds both S & P well. Easy to fill and comes with a top to cover grinder when not in use. Perfect look and style for a table or to store for easy reach beside your stove. It also come with 2 extra replacement grinders if needed. An excellent product at a reasonable price! See pic for a size comparison next to a solo cup.
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Reviewed in the United States on March 2, 2025
★★★★★ 5
These are great!
Size: 2.5" x 5.1"
I've had these for about a year year and a half and I really like them this morning the salt shaker broke, so I just ordered another set (they're not sold individually) to replace the one that broke. If you should happen to drop them on the floor the plastic top will crack!!
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Reviewed in the United States on March 14, 2026
★★★★★ 5
Great addition in my kitchen
Size: 1.7" x 5.1"
I really like these grinders. They are perfect size. I use them for other seasonings that I want to grind up for marinating or cooking. They are adjustable so if I want larger or smaller grinds, easily do-able. Great value for the price. They look nice and are easy to use. Also easy to clean.
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Reviewed in the United States on June 10, 2026
★★★★★ 1
Doesn't last
Size: 2.5" x 5.1", Size: 2.5" x 5.1"
This grinder appeared to work great and is one of the few ceramic options available. Unfortunately, the ceramic grinder has already broken inside, detaching from the bottle altogether. There are probably tiny plastic pieces in my leftover peppercorns. Don't buy it unless you want to purchase it every few months, which is unfortunate.
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Reviewed in the United States on May 7, 2026