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๐ Turn Rough Rocks into Coveted Gems โ Your DIY Jewelry Journey Starts Here!
The National Geographic Rock Tumbler Refill Kit offers 1 lb. of genuine rough agate rocks sourced worldwide, paired with four grades of polishing grit and jewelry fastenings. Designed for ages 8+, this kit transforms raw stones into dazzling gemstones while providing an educational guide on agates. Compatible with all rock tumblers and backed by National Geographicโs quality guarantee, itโs the perfect blend of STEM learning and creative craftsmanship.






































| ASIN | B07STXHGVN |
| Additional Features | Agate mix from around the world, four grades of grit, jewelry fastenings, and a learning guide |
| Age Range Description | 8 years and up |
| Age range (description) | 8 years and up |
| Art Craft Kit Type | Rock Tumbler Kit |
| Best Sellers Rank | #76,127 in Toys ( See Top 100 in Toys ) #1,180 in Educational Science Kits |
| Brand | Blue Marble |
| Brand Name | Blue Marble |
| Color | Agate |
| Colour | Agate |
| Customer Reviews | 4.6 out of 5 stars 6,207 Reviews |
| Global Trade Identification Number | 00816448026935 |
| Included Components | 1 lb rocks, jewelery fastenings, grit |
| Item Dimensions | 7.6 x 7.6 x 20.3 centimeters |
| Item Type Name | Rock Tumbler Refill โ 1 lb. Mix of Genuine Rocks from Madagascar for Rock Polishers |
| Item Weight | 1.2 Pounds |
| Item dimensions L x W x H | 7.6 x 7.6 x 20.3 centimeters |
| Manufacturer | JMW Sales, Inc. |
| Manufacturer Part Number | NGAGATEREFILL |
| Material | Rough Rocks |
| Material Type | Rough Rocks |
| Model Name | Rock Tumbler Refill โ 1 lb. Mix of Genuine Rocks from Madagascar for Rock Polishers |
| Model Number | NGAGATEREFILL |
| Number of Pieces | 1 |
| Paint Type | Acrylic |
| Product Style | Agate Mix |
| Scale | small or compact |
| Seasons | All Seasons |
| Set Name | National Geographic Rock Tumbler Set |
| Size | miniature |
| Subject Character | Gemstones |
| Theme | Geology |
| UPC | 816448026935 |
L**K
Breathtaking stones! Expectations blown away.
I purchased this kit for a different brand of rock tumbler and I am currently still in the tumbling process. When I opened the box I was shocked by two things. First, I received higher quality stones than expected. Even in their rough states, I could tell that they would all turn out beautiful. This kit includes the most amazing stones any hobbyist could ever want. Also, there were twice as many stones as could fit in my brand of tumbler, so I got a two-for-one bonus by accident. My expectations were exceeded. I assumed the kit would include a few small okay-looking stones and the rest would be disappointing. Not so! The manufacturers include huge, beautiful stones in this kit. I've used another kit that included really lackluster and not-so-pretty stones, but the quality of this product blew my mind. I expected half as many stones, each at half the size, and maybe altogether the stones would be pretty lame. Maybe a few would be pretty. Even though I'm far from done tumbling this kit, I can already tell that my stones will all be beautiful. This kit is the one to buy, even if your tumbler is of a different brand. That said, the other thing I noticed is that the kit does not include any instructions, which can be troublesome for those like me who purchase this kit for another brand of tumbler. Not a problem, though, as a quick Google search and my own judgement of the stones after each cycle will be sufficient to get the results I desire. It's the nature of the craft, anyway. More of an art than a science, as no two stones will ever be alike. I will definitely purchase this again! (Note: pictures included in review depict half of the stones in the kit prior to tumbling, and the other half of the stones after the first grit cycle.)
R**.
satisfied with product
I got gud amount of stones and very satisfied with this product.happy with delivery time also fast delivery.i will purchase more in future.thank u.
A**R
Delivered on time
Arrived on time and in great condition
C**E
A great gift
Purchased this with the matching rock tumbler, it was a huge hit with my son, absolutely loves it. Wish I had found this years ago.
T**E
Young gem makers hobby
Bought as a birthday gift for my granddaughter. She is 11 and enjoys this kind of craft.
Trustpilot
2 weeks ago
1 month ago