















💎 Elevate your hobby: polish, shine, and own the gem game!
The NATIONAL GEOGRAPHIC Rock Tumbler Kit features a durable 3-pound capacity barrel with a quiet stainless steel lid, automatic shutoff timer, and adjustable speed settings. It includes 3 lbs of assorted rough gemstones, four polishing grits, five jewelry fastenings, and the innovative reusable GemFoam polisher for a brilliant finish. Designed for STEM learning and creative expression, this award-winning kit offers a professional tumbling experience ideal for beginners and enthusiasts alike.





| ASIN | B08DL95CWL |
| Assembly Required | No |
| Batteries Included | No |
| Batteries Required | Yes |
| Customer Reviews | 4.5 4.5 out of 5 stars (4,623) |
| Date First Available | 3 August 2020 |
| Educational Objective(s) | STEM, Concept Development Skills, Hand-Eye Coordination, Critical Thinking, Reasoning Exploratory Skills |
| Generic Name | Rock Tumbler Kit - 3 Lb. Extra Large Capacity Barrel |
| Included Components | 3lb Assorted Rough Gems, 4 Stages of Polishing Grit, 5 Jewelry Settings, Complete Rock Tumbler Kit, GemFoam Final Stage Rock Polisher, X-Large 3lb Capacity Barrel |
| Item Dimensions LxWxH | 32.4 x 26.2 x 17 Centimeters |
| Item Weight | 3 kg 700 g |
| Item model number | NGTUMBLER3LB |
| Language | English |
| Manufacturer | JMW Sales, Inc. |
| Manufacturer recommended age | 8 years and up |
| Material Type(s) | Plastic Stainless Steel |
| Model Number | NGTUMBLER3LB |
| Net Quantity | 1.0 Count |
| Number of Game Players | 1 |
| Product Dimensions | 32.4 x 26.2 x 17 cm; 3.7 kg |
| Remote Control Included? | No |
R**G
I bought this a while ago now and it works perfectly. If you only want to polish small volumes then buy one!
S**S
The rock tumbler ran great for 4 weeks, now it has an E1 error even when no barrel is used. (Just the base running). Contacted the manufacturer and they sent a replacement the next day. This is a fine rock tumbler for a beginner. (We are)
D**N
For a drum that goes round and round, it’s expensive. It’s a very well built machine, reassuring quality and heft, and seals the liquid in very well. It’s not quiet. I’ve never had or seen one of these before, so it may be quiet in comparison to others, but it is not quiet. Have it in a cupboard in the kitchen and can hear it throughout all the downstairs. It’s not an annoying noise however, similar sound to a humming fridge so it does fade into the background very easily. Can’t really comment on the performance, it just rotates rocks, but it’s smooth and consistent. Came with an extra drive belt too which is a genuinely fantastic bit of thought. Highly recommend, based on my very limited experience.
C**N
Ho 67 anni, nel 2023 ho acquistato questo articolo e, con mia grande sorpresa, mi ha regalato 1 anno e mezzo di grandi soddisfazioni! Ho burattato semplicemente sassi di mare, nessuna pietra di valore dunque, ma la soddisfazione forse è proprio questa: "mettere a nudo la loro bellezza nascosta"! Grazie a questa macchina ho aggiunto un super hobby al mio tempo di insegnante volontaria in pensione, proverò con il mercatino per la scuola a far conoscere ai bambini questa bellissima attività! Tre giorni fa la macchina ha avuto un problema, ma è stato subito risolto, ringrazio national geographic per la sollecita e graditissima soluzione trovata per me! CONSIGLIATISSIMO!
A**ー
配送都合を調整して頂き、スムーズに受け取り完了出来ました。
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