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
Condition: New
Buy Now, Pay Later
As low as
$9.17
/ mo
Learn more
- – 6-month term
- – No impact on credit to apply
- – Instant approval decision
- – Secure and straightforward checkout
Ready to go? Add this product to your cart and select a plan during checkout.
Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.
Learn more about financing & leasing here.
Free shipping on this product
30-day returns
Learn more
FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
In Stock.
Arrives
Sunday, Jul 26
Recently Viewed
Features
- 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.
Brand Name: Dan&Darci
Age Range Description: Kid, Adult
Educational Objective: STEM
Manufacturer Maximum Age (MONTHS): 1296.0
UPC: 855831008158
Manufacturer Minimum Age (MONTHS): 96.0
Model Number: Rock Tumbler
Manufacturer Part Number: DD-007
Manufacturer: Dan&Darci
Unit Count: 1 Count
Included Components: Instruction Booklet + Learning Guide, Jewelry Fasteners, Mesh Strainer, Power Cord, Spare Motor Belt, Rock Tumbler, 0.5 lb Assorted Rough Stones,4 Grit Packets
Theme: Geology
Is Assembly Required: No
Material Type: Metal
Size: 23 cm x 33 cm x 14 cm
Item Dimensions: 12.7 x 10 x 5.7 inches
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Jul 26
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.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- Zip Pay in 4
- Financing through Apple Pay
- Financing through Google Pay
Learn more about financing & leasing here.
Similar Products
Top Amazon Reviews
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
Reviewed in the United States on May 12, 2026 by Darlene Etta
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".
...
show more
Reviewed in the United States on March 13, 2022 by Justin
The first thing I noticed was that the drum and base unit both seem very nicely built. The second thing is that it seems much quieter than I expected. I think the fact that the drum is overmolded with rubber helps a lot in that way. Muffles the sound of the rocks rattling around in there. So my initial impressions were all very good. Currently tumbling my first batch. The little pack of rocks that came with the tumbler, using their grit and their recommended times. I'm on grit pack #2 of 4. The first grit did a great job, smoothing the rough rocks out nicely. I still have a few days to go before I finish grit #2. Comes with a replacement drive belt, which I am happy to see. I expect that is what will fail eventually, as it is a simple piece of rubber. But that's to be expected... as evidenced by them including the spare. A nice touch. Instructions couldn't be easier. If you can read and understand this review, you will have no problems. If the unit works well for a long time, it will have earned this "premature" five-star review.
...
show more
Reviewed in the United States on June 28, 2022 by Rick S.
Run it constantly and it works great.
Reviewed in the United States on April 12, 2026 by jessica
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.
...
show more
Reviewed in the United States on November 26, 2025 Reviewed in the United States on November 26, 2025 by kytrailhikers
While this item is not a toy, and is actually a nice way to step into the world of rock and gemstone collecting without a huge investment, I purchased it for my kids. Due to school shut-downs the easter bunny this year brought science items. This was one of them. The tumbler does just that, it tumbles or rolls the rocks, which makes it a bit loud, but still managable. The stones are nice quality and the kids should have fun trying to figure out what type they all are. There is a good variety of stones as well. The grit packets do what they are meant to do. Just read the booklet, add your stones grit and water. Close up the tumbler, set the timer and speed, and let it go. We are currently in stage two of our tumbling, but so far I am liking the product, more importantly so are the kids.
...
show more
Reviewed in the United States on April 18, 2020 by Kate
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.
...
show more
Reviewed in the United States on November 16, 2023 by Rachel Schumacher