---
product_id: 118232511
title: "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"
brand: "dan&darci"
price: "€ 208.36"
currency: EUR
in_stock: true
reviews_count: 13
category: "Dan&Darci"
url: https://www.desertcart.hr/products/118232511-advanced-professional-rock-tumbler-kit-with-digital-9-day-polishing
store_origin: HR
region: Croatia
---

# 9-day digital timer low-noise leak-resistant barrel 3-speed precision control 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

**Brand:** dan&darci
**Price:** € 208.36
**Availability:** ✅ In Stock

## Summary

> 💎 Turn your rock collection into a polished masterpiece—because ordinary stones deserve extraordinary shine!

## Quick Answers

- **What is this?** 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 by dan&darci
- **How much does it cost?** € 208.36 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/118232511-advanced-professional-rock-tumbler-kit-with-digital-9-day-polishing)

## Best For

- dan&darci enthusiasts

## Why This Product

- Trusted dan&darci brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **STEM Meets Style:** A perfect blend of education and fun—ignite curiosity and impress your circle with your geology prowess.
- • **Set It and Forget It:** Advanced 9-day digital timer with auto shut-off lets you focus on life while your gems shine.
- • **Whisper-Quiet Operation:** Enjoy a peaceful workspace with a leak-resistant barrel engineered for ultra-quiet performance.
- • **Tailored Tumbling Experience:** Choose from 3 speed settings for customized polishing results that fit your unique stones.
- • **Master the Art of Gem Polishing:** Transform rough stones into dazzling gems with professional-grade tumbling precision.

## Overview

The Dan&Darci Advanced Professional Rock Tumbler Kit is a comprehensive STEM-focused geology tool featuring a powerful motor, a leak-resistant and quiet 1 lb. capacity barrel, 3-speed settings, and a digital 9-day timer with auto shut-off. It includes all essentials—grit packets, assorted rough stones, jewelry fasteners, and an illustrated guide—making it ideal for kids and adults eager to learn and create polished gems at home.

## Description

desertcart.com: 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 : Toys & Games

Review: 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.
Review: 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...

## 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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07Q32W334 |
| Age Range Description | Kid, Adult |
| Best Sellers Rank | #25,421 in Toys & Games ( See Top 100 in Toys & Games ) #11 in Kids' Rock Tumblers |
| Brand Name | Dan&Darci |
| Customer Reviews | 4.5 out of 5 stars 9,552 Reviews |
| Educational Objective | STEM |
| 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 |
| Item Dimensions | 12.7 x 10 x 5.7 inches |
| Manufacturer | Dan&Darci |
| Manufacturer Maximum Age (MONTHS) | 1296 |
| Manufacturer Minimum Age (MONTHS) | 96 |
| Manufacturer Part Number | DD-007 |
| Material Type | Metal |
| Model Number | Rock Tumbler |
| Number of Items | 1 |
| Number of Packs | 4 |
| Set Name | Advanced Professional Rock Tumbler Kit |
| Size | 23 cm x 33 cm x 14 cm |
| Theme | Geology |
| UPC | 855831008158 |
| Unit Count | 1 Count |

## Images

![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 - Image 1](https://m.media-amazon.com/images/I/81C6ibFx1QL.jpg)

## Questions & Answers

**Q: what is the warranty for and how long is it?**
A: I don’t think there is a warranty for it. However, if it’s defective call the company. They seem to be really good at doing the right thing

**Q: Can you confirm the voltage rating of the power cord? only 110v or up to 240v? thank you.**
A: The power supply will work with 100-240v. It has a US plug.

**Q: I get an error code everytime I try and run it doesn't anyone know why? I hardly have anything in it.**
A: Check the owners manual

**Q: Mine didn't come with an instruction booklet. Where can i find one online or request one?**
A: Contact Amazon or the Seller about getting a booklet. As for online guidance, doing a quick google search on how to use a rock tumbler will help.
You can also put your tumbler info into youtube and see someone setting it up and using it. A quick search of Amazon shows several books on rock tumbling as well as gemstone/rock identification.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Trying things differently and getting awesome results
*by K***S on November 26, 2025*

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.

### ⭐⭐⭐⭐⭐ Love this!
*by A***G on April 12, 2019*

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...

### ⭐⭐⭐⭐ Tumbler works well, but far too little grit is supplied
*by J***N on March 13, 2022*

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".

## Frequently Bought Together

- 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
- Blue Marble National Geographic Rock Tumbler Grit and Polish Refill Kit - Tumbling Grit Media, Polish Up to 20 lbs. of Rocks, Works with Any Rock Polisher, Rock Tumbler Supplies
- NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit – 1Lb. Gemstones and Rocks for Tumbling including Unpolished Amethyst and Quartz – Rock Tumbler Supplies include Rock Tumbler Grit and Jewelry Accessories

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.hr/products/118232511-advanced-professional-rock-tumbler-kit-with-digital-9-day-polishing](https://www.desertcart.hr/products/118232511-advanced-professional-rock-tumbler-kit-with-digital-9-day-polishing)

---

*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-08-29*