|Remote Control Included?||No|
|Release date||7 August 2017|
|Mfg Recommended age||8 - 99 years|
|Item Model Number||NGHOBBYTUMBLER|
|Product Dimensions||27.94 x 23.62 x 19.05 cm; 2.5 Kilograms|
NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit - Rough Gemstones, 4 Polishing Grits, Jewellery Fastenings, Great STEM Science Kit for Geology Enthusiasts
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- CREATE YOUR OWN GEMSTONES - Make any stone sparkle and polish everyday rocks into dazzling gemstones! This rock tumbler kit 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 – Our high-quality tumblers are made with a durable motor that’s designed to last for years. The leakproof rubber barrel reduces sound, making it 75% quieter than other plastic models. Makes an excellent STEM gift or activity for girls and boys!
- A COMPLETE HOBBY TUMBLING KIT - This kit has everything you need to create polished gemstones. You get the tumbler, four polishing grits, a sifter, nine types of real rough gemstones, plus a detailed full-color learning guide where you’ll learn interesting facts about each of the included gemstones.
- EASY TO USE – Simple instructions and one-touch settings make rock tumbling fun and easy. Control the number of days for each tumbling cycle with the one-touch timer and automatic shutoff feature, so you can set it and forget it. This is a great gift for kids!
- 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.
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Great way to start a rock collection!
Learn about the exciting hobby of rock tumbling with National Geographic. This set includes all the accessories you’ll need to start polishing dazzling gems. Rock tumbling is tons of fun and a great way to start an extraordinary rock collection. Kids can use the included jewelry fastening to create beautiful homemade jewelry!
Contents and Features:
• High-quality tumbling machine with powerful motor that will last for years
• Automatic shutoff timer so you can set it and forget it
• Noise reducing leak-proof barrel with stainless steel lid
• Half pound of gemstones from around the world (9 types) and four grades of grit
• Jewelry fastenings so you can create your own unique jewelry
• Full-color information guide with cool facts about each of the gemstones included
• Easy-to-follow rock tumbling instructions
• 2-year manufacturer warranty
Rock tumbling is a fun activity for children of all ages and promotes an interest in geology and science. Introduce your kid to science the fun way! Join National Geographic as we inspire future generations by showing them the wonders of the natural world.
National Geographic Toys is proud to provide a 100% satisfaction guarantee with all our products so that you can buy with confidence.
About the National Geographic Society
With a mission to inspire people to care about the planet, the 126-year-old National Geographic Society is one of the world’s largest nonprofit scientific and educational organizations.
National Geographic’s net proceeds support vital exploration, conservation, research, and education programs.
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This is my first rock tumbler. I bought it to polish beach agates. I ran mine in the kitchen. Heat-wise: the tumbler didn't get hot (not sure if they can). Sound-wise: I would say this rock tumbler is fairly quiet, though not silent. If you like the ambient noise produced by a sound machine then you may really like the sound. My husband, who cannot live without ambient noise, loved the sound produced by this rock tumbler. For me it was little distracting, so I moved it into an empty kitchen cabinet and it was perfect. In the cabinet, it sounds like a kettle boiling or rain falling on a sky-light.
As an aside, I'll admit I don't always read manuals thoroughly, but I am so very glad I did this time. Don't put the slurry down the drain. The sediment separates from the water and hardens to a thick concrete-like substance. It will destroy your pipes. I'll say it again: never, ever, pour the slurry (or tumbling-residue) down the drain.
1) Smoothen rocks without much work.
1) Cannot be polished to high shine.
2) Burnishing with soap and apply mineral oil still cannot acheive shininess as shown in picture.
Overall, it's not bad to smoothen up the rocks then cheat it by applying urethane.
We bought this for our son as a 7th birthday gift. It's the perfect mid-range rock tumbler! It's sturdy and doesn't seem like it will break. It's been running now for over 2 weeks. It's definitely not silent, but with its rubber barrel, I suspect it's tougher and quieter than one with a plastic barrel. We keep it in the basement, but can see it'd be annoying if it was somewhere in the house. It has a handy feature where you can set it for up to 7 days and it'll tell you how many days are left- great for a kid! It includes a nice little instruction manual with information about the history of rock tumbling and description of the rocks included. It's a nice, reasonably-priced kit that includes everything you need to start tumbling rocks right away!
Update: now that we've completed a batch, I figured I'd add some info. We still think it's a nice kit! The little sieve that comes with the kit is very handy! Our final stones were smooth and lovely. However, they weren't really shiny. After some reading, we learned that there is a bit of an art to this and we need to be a little more meticulous in the cleaning of the tumbler between grits. Overall, though, our 7-year-old is quite pleased with the kit. We bought the jasper set and will try that next!
Update #2-- SHINY ROCKS!
We did a few batches and couldn't get shiny rocks and we lost interest. My kiddo is now almost 9 but just started becoming interested in geology a lot more. We decided to try again. After reading some about it, I decided to try a better brand of grit and IT WORKED! We bought Rock Tumbler Grit for 3 Pound Tumbler
by Professional Grade Rock Polishing Grit
And followed the instructions **carefully,** making sure to clean the tumbler tub very meticulously after each tumble. We also purchased tumbling pellets (Rock Tumbler "Sinking" Plastic Pellets / Beads Used For Final Polishing & Burnishing Stages) for the final two stages. The new grit had an additional stage which made all the difference. The jade set came out mostly lovely and shiny. They were not all consistently shiny, but I see promise! I added a picture using the flash to show off the polish. We're going to try the nee grit with a different set of stones now.