National Geographic Rock Tumbler Kit - 1.36 kg Extra Large Capacity Barrel with 3-Speed Motor & 9-Day Timer, Includes Rocks for Tumbling & Rock Polisher Grit, Stone Polisher for Adults & Kids

Bought this tumbler as a Christmas present. Recipient was at first delighted but the tumbler has now stopped working. On closer inspection it appears that the brushes are worn out. So I looked to buy some replacement brushes but apparently neither National Geographic nor Blue Marble supply them!! So this will be an expensive purchase. *Update* Have managed to contact Blue Marble and they have promised to send replacement. Watch this space but am happy with their response. Complete new rock tumbler set arrived today, expected by next Wednesday. Very happy husband, excellent customer service.

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.

An honest review, the tumbler is fantastic, I watched some Youtube videos comparing it to others and have found that it has low energy use and can tumble much faster than most other tumblers. It's in my kitchen and with the door closed I cannot hear it when I'm watching TV or listening to music (Although I quite like the sound of the tumbler, it's relaxing to me so I leave my door open). I am a total amateur and my only experience is picking up pretty stones in my travels. I've accumulated a few nice ones! But this kit also came with some very nice stones too! (Although many too small to survive the process). The instructions said that the first grit should be run for 3 days on the top speed, but after around 24 hours I checked my first batch and most were ready, my second and third batch ran again for another 24 hours each and I ended up with 1 large batch of well rounded stones, however many of the stones shrank significantly and I think a couple totally disintegrated so be careful! Check often, rinse them off (Not down the sink) and take them out when ready, put the not-ready ones back in. Unlike the suggestion to tumble them with the first grit for 3 days on max speed... I'd have lost most of my stones if I had blindly followed that instruction. Be ready to have to deal with sludge, the water gets very dirty and does not want to be poured down the sink, I put it in a bucket and leave it for 24 hours to settle than syphon off the clean water and leave the dirty sludge to dehydrate into a solid. I hope that helps, I'm really enjoying this new hobby! But I've already run out of stones, oh no!

In the uk the bag of rocks that came where tiny most didnt make the progress. Turned to dust we could do with less rocks but a decent size like the ones in american products as seen on you tube. Apart from That and micro polished rocks they turned out average using their grits and time periods. Have refined the process with different grits and rocks turns out a highly polished selection now my advice is buy another barrel For final stage.

Bought for my 9 year old Granddaughter. She loves being outdoors looking for rocks etc. This comes as a complete kit including the rocks. Not cheap but it's well made and results are great. She thinks it's "spot on".

So far so great We been tumbling for two days and is looking awesome. I can see my self doing tons of rock great fun. Guess my family will be getting rocks for Xmas and birthdays lol

Great little machine. Everything you need is included.

It worked fine until the motor died. Checked the brushes to repair but you can't replace as the holder snapped. Very poor motor. Have only been doing our third batch. Kids are disappointed.

My Nat. Geo. 3lb rock tumbler arrived the next day I placed my order with Amazon AU Brilliant service and very well packed. Within 30 mins I put it to wok. Absolutely no surprises or disappointments as i fully researched it on YouTube [ Robs Mitchan Rocks ] I highly recommend this product and service from Amazon Aust.

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!

If you’ve never tumble rocks before (us), it’s fascinating to see the end products.

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。

I’m not sure what to write… the stones are smooth as silk, but NOT shiny as I had hoped them to be. What can I do to make them shiny as the stones on the box??? the stones in the blue bowl have yet to be tumbled and polished, the stones in the metal tin have gone through the 4 phases and sashe’s of grit-polishing…