Dan&Darci Advanced Professional Rock Tumbler Kit - with Digital 9-Day Polishing Timer & 3 Speed Settings - Turn Rough Rocks into Beautiful Gems : Great Science & STEM Geology Toy for Kids All Ages
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Availability:
In Stock.
Arrives
Sunday, Nov 1
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At a glance
- Condition
- New
- Model
- DD-007
- Dimensions
- 12.7 x 10 x 5.7 in
- Material
- Metal
- Age Range Description
- Kid, Adult
- Educational Objective
- STEM
- Sub Brand
- Dan&Darci
- In the box
- Instruction Booklet + Learning GuideJewelry FastenersMesh StrainerPower CordSpare Motor BeltRock Tumbler0.5 lb Assorted Rough Stones,4 Grit Packets
Features 5
- Turn rough rocks into polished gems: Discover and learn the fun process of rock tumbling with the Advanced Rock Tumbler. Pour in the rough stones and grit and let the machine do its job!
- Complete kit: Includes: rock tumbler machine, low-noise barrel (1 lb. capacity), 4 grit packets, 1/2 lb. assorted rough rocks, mesh strainer, jewelry fasteners, gem storage bag, and an illustrated easy-to-follow instruction and learning guide booklet.
- Powerful quality: Runs on a powerful heavy duty motor that will last for a very long time, and includes a leak-resistant barrel that runs quieter than the other brands.
- Advanced features: Includes speed controls (providing more granular tumbling results), a 9-day timer (shuts off automatically when you desire), all displayed on beautiful LCD screens.
- A fun and educational gift for all ages: It's not often that a science project can be fun and engaging, but this kit achieves both! It fascinates children and adults as soon as they pull it out of the box and is a perfect STEM project for any age. It fosters a love for science, geology and mineralogy in a fun and exciting way.
Description
We are Dan & Darci! As you can tell from our name, we think that two are better than one. That’s why we create quality toys and science kits that are BOTH entertaining AND educational. Our lab of mad scientists develops the coolest products for kids ONLY — because they know that while you love to grow your brains and be the smartest one in the room, you’re only going to do it if you’re having fun! Welcome to the fabulous world of rock tumbling! For thousands of years, Mother Nature has been tumbling rocks in water and sand to make them smooth and shiny. Now it's your turn! Collect all types of rocks and turn them — yourself — into colorful gemstones. Make your own jewelry, use them in crafts or decorations, or just collect them for fun! Get the Dan&Darci Advanced Rock Tumbler, bring your curiosity, and get your gem collection started now! We are Dan & Darci! As you can tell from our name, we think that two is better than one. That’s why we create quality toys and science kits that are BOTH entertaining AND educational. Our lab of mad scientists develop the coolest products — because they know that while you love to grow your brains and be the smartest one in the room, you’re only going to do it if you’re having fun! Although this is extraordinarily educational, it’s also wildly entertaining for all ages, which makes it an excellent gift! It’s not often that a science project can be fun and engaging, but this kit hits the nail on the head and fascinates children and adults as soon as they pull it out of the box. Whether you’re a parent or a schoolteacher, you’ll quickly appreciate the vast knowledge that this can provide. While being super fun and engaging, this one product provides young students with that essential hands-on experience they need to truly absorb this priceless knowledge and information. Everything is included - just add water! Includes: Easy step-by-step instructions so that everyone can follow along easily. Also included is a comprehensive learning guide on the history of rock tumbling, and explanation of all the rocks included in the kit.
Specs 17
| Brand Name | Dan&Darci |
|---|---|
| Age Range Description | Kid, Adult |
| Educational Objective | STEM |
| Sub Brand | Dan&Darci |
| Set Name | Advanced Professional Rock Tumbler Kit |
| Number of Packs | 4 |
| Number of Items | 1 |
| Unit Count | 1 Count |
| UPC | 855831008158 |
| Model Number | Rock Tumbler |
| Manufacturer | Dan&Darci |
| Manufacturer Part Number | DD-007 |
| Manufacturer recommended age | 8 years and up |
| Theme | Geology |
| Material Type | Metal |
| Size | 23 cm x 33 cm x 14 cm |
| Item Dimensions | 12.7 x 10 x 5.7 inches |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Nov 1
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Trying things differently and getting awesome results
So far so good, but customer service is lacking so keep that in mind. I emailed weeks ago and never got a response to a question. When the tumbler shuts off it is still on day 1, so I wasn't sure if it was supposed to be that way. I thought it had stalled, so I ran it another day. Later on, I ran a second load of agates in it, and it did the same thing, so I can only assume it is supposed to do that. I've only ran it twice, but I'm loving the results. I didn't use the grit they provided. I use polly grit, and I'm getting awesome results. I will use their grit one day to see what it does. I do lapidary work, so I was doing things different. Either grit you use, I recommend going to step 3, just like other reviews said. Here's something to try. Use grit 3 fine pre polish, a tablespoon, along with half a tablespoon of #1 coarse. Run it for 3 Days on speed 3. Then run it with the same contents for another day on speed 1. Rinse everything. Reload and add in grit 4, tablespoon, with half a tablespoon of cerium oxide. Run the grit 4 and cerium for 2 days on speed 1. I had very good shine and rounded edges. But keep in mind, this process is for agates. For softer stones, you'll want to slow your speed and maybe drop a day. If this thing keeps working, or at least a good while, I would definitely invest in it again. My only regret is that I didn't buy their larger tumbler.
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Reviewed in the United States on November 26, 2025 by kytrailhikers
Love this!
I often collect rocks wherever I go, I have for years, and I’ve wanted to get a rock tumbler for some time. When my daughter expressed interest finally getting one was an instant no-brainer. I liked the look of the Dan&Darci machine; it looked solid and stable, it was professional looking. I liked that it had multiple speeds and a multi-day timer. As soon as we got it my daughter couldn’t wait to get started. The machine was as solid and sturdy as it appeared and the instructions were very clear and easy to follow. We put in the rocks, grit, and water, sealed the barrel and turned it on. It made much less noise than expected. We’ve had this running for a while; no issues, no leaks, no problems … many jealous friends and family members...
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Reviewed in the United States on April 12, 2019 by Andrew Eisenberg
Tumbler works well, but far too little grit is supplied
The tumbler works well enough, it's very reasonably priced, and generally a good kit. The rocks that come with it are a good starter; there are some findings included for finished rocks; and the instructions are reasonably good (accepting some significant caveats below). There's also an included strainer, but we found it much too small, and just used a small colander from our kitchen. Accepting the good points, there are a few important things to consider: 1) The kit comes with a paltry amount of grit. We followed the instructions to the letter using the small grit packets provided in the box, and just couldn't get a good polish on the included rocks. However, we had also bought a set of additional grit at the same time, so we re-ran exactly the same rocks with proper amounts of grit and got a beautiful polish. The additional grit was exactly the same grade and composition as the original, but its instructions called for 2-3x more grit per run. So, I expect a lot of people will be underwhelmed at the polish they get, not realizing that the minimal amount of grit is likely the problem. Since grit is a consumable that you'll need more of anyway, you can save yourself a wasted month of tumbling by buying more grit and just topping off what comes with the kit (2 tbsp for stages 1 and 2, and 1 tbsp for stages 3 and 4). 2) The tumbler runs fast, even at its slowest speed (seems at least twice as fast as the tumblers I'm familiar with). This means it's on the louder end (we kept it in the garage) and it doesn't seem to do a good job on more angular or larger rocks, because the tumbling action is just too aggressive. Anything under 3/4" diameter and/or mostly round will polish up great—which mostly included the rocks that came with our set—but anything outside that ended up with some unpolished edges (although the smooth/flat parts still polished up well). That stated, you can cheat and use mineral oil to mostly hide the rough edges, but they still won't look as good as they do with a proper polish. (Although, I haven't yet tested if ceramic media or poly pellets could improve this situation by cushioning the rocks during the final polish stage.) 3) The instructions could be better with respect to cleaning, and don't cover burnishing at all. For cleaning between stages, after a thorough rinse I strongly recommend putting the rocks back in the tumbler with warm water and a drop or two of dish soap, and then just running it for an hour on its lowest speed. This will clean out all of the grit from the last stage. Then just re-rinse (the sink is fine in this case, since there's so little grit) and start the next tumbling stage. You may want to burnish as a final step, to get a better shine. There are a number of good guides available, so I suggest just searching for the term "rock burnishing".
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Reviewed in the United States on March 13, 2022 by Justin
great basic tumbler.
works great! variable speed, day timer both work amazing! my only suggestion would be to enclose replacement lid seals, we wore through the rubber on the inside of the lid after only about 2 batches run through. otherwise quite happy with the purchase! just keep rollin'!
Reviewed in the United States on December 24, 2025 by Ian
Easy to use, but not built to last
Comes with only enough grit for one set of rocks, must purchase more grit for more rounds. The tumbler pushes the barrel towards one side such that it pushes constantly against the washers on the rollers that keep the barrel in place. It started to wear down a groove in the rubber on the barrel, so I turned it metal cap side towards the washer it was pushing against. This caused wear on the washer. For grit 3, I angled the barrel by propping one side of the base up so gravity would pull it away from the washer as the rollers pushed it towards the washer to balance it in the middle. This was a little better, but I started you see wear/divets on the rollers. It seems like this just isn't build for the repetitive motions needed for days of running for each grit. It takes about a month for each round off new rocks. We have it running in the garage on the other side of the wall as the master bedroom and we can hear it through the wall. My husband thought it was water leaking at first until he found where the noise was coming from.
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Reviewed in the United States on June 6, 2022 by GJ
Great despite the issues at first
I loved it great kit but. I used it as specified in the instructions. I only filled the barrel up about half way with rocks, filled with grit and water to the top of rocks.. and ran it on Speed 3 for 6 day setting. I let it run.. after about an hour it was showing 'E' for error. It would only run for several minutes before stopping with an error, no matter what speed it was set for. It would stop even without the barrel attached. I tried unplugging for a while and trying again. With less rocks and water and it won't do anything now. It displays an E right away and the motor won't turn. Very disappointing. Especially considering it should've lasted for a long time if used correctly and it didn't even last 2 hours. I was so excited for my daughter to use this and see the world of gems. UPDATE. their customer service was amazing. Replaced it free of charge. Well try this again. Hopefully it works this time
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Reviewed in the United States on May 7, 2020 by Alicia
Definitely not the rock tumbler I grew up with!
Remember those old national geographic rock tumblers? They had the red barrel and barely held anything? That's the rock tumbler I had before this one. When I read that this rock tumbler was "suitable for use indoors," I called bull. I plugged it in outside where I was sure to not hear it ruckus and only put a few rocks in the bottom. I followed the instructions on how to proceed with setup and went forth expecting leakage and excessive noise. Imagine my shock when this rock tumbler did neither! It hardly made any noise and no leaks anywhere. I regularly fill the barrel 2/3 of the way and am always amazed with the product I have after a few days. It seems nothing is too much for it. The finished product is always spectacular! The noise is always minimal. I'd have no problem buying this again. If anyone wants a "starter" tumbler, I cannot recommend this one enough.
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Reviewed in the United States on November 16, 2023 by Rachel Schumacher
Love this one. Beware of other brands.
Run it constantly and it works great.
Reviewed in the United States on April 12, 2026 by jessica