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NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit - 1 Lb. Gemstones and Rocks for Tumbling Including Unpolished Amethyst and Quartz – Rock Tumbler Supplies Include Rock Tumbler Grit and Jewelry Accessories

4.6 4.6 out of 5 stars 5,906 ratings

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Style: Gemstone Mix
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Purchase options and add-ons

  • GEMSTONES OF 9 VARIETIES - Tiger's Eye, Amethyst, Aventurine, Rose Quartz, Red Jasper, Agate, Sodalite, Dalmatian Jasper, Hematite (1 lb. total)
  • FOUR GRADES OF GRIT - Coarse, medium, fine, polish. Transform your stones from rough rocks to dazzling gemstones!
  • JEWELRY FASTENINGS - 1 necklace, 1 set of earrings, 1 keychain, 1 ring. Create custom jewelry from your newly polished gemstones!
  • DETAILED LEARNING GUIDE - Our learning guide will teach you all about these unique gemstone specimens and includes many amazing and fascinating facts.
  • 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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NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit - 1 Lb. Gemstones and Rocks for Tumbling Including Unpolished Amethyst and Quartz – Rock Tumbler Supplies Include Rock Tumbler Grit and Jewelry Accessories


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Product Description

National Geographic 1-Pound Rock Tumbler Refill Kit - Gemstone Variety

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked.

Keep the fun rolling with the National Geographic 1-Pound Gemstone Refill Kit! Includes 9 varieties of gems (Tiger's Eye, Amethyst, Aventurine, Rose Quartz, Red Jasper, Agate, Sodalite, Dalmatian Jasper, Hematite); 4 courses of polishing grit; and jewelry fastenings for creating dazzling jewelry.

1 pound of rough rocks, polishing grit, jewelry fastenings and more!

Stock up and keep the fun rolling with National Geographic’s 1 Pound Gemstone Rock Tumbling Refill Kit!

This Gemstone Refill Kit Includes:

  • 1 pound of raw jasper rocks for use in National Geographic and other tumblers
  • 9 varieties of stones: Tiger’s Eye, Amethyst, Aventurine, Rose Quartz, Red Jasper, Agate, Sodalite, Dalmatian Jasper, Hematite (1 lb. total)
  • 4 courses of polishing grit
  • 6 jewelry fastenings for creating dazzling jewelry with your tumbled gems
  • 1 Learning Guide

Order today and continue creating polished, stunning tones with your National Geographic Tumbler!

We make the highest quality hands-on science toys, and all products are backed by exceptional service. With a mission to inspire people to care about the planet, the National Geographic Society is one of the world’s largest nonprofit scientific and educational organizations.

national geographic science toys stem kits for kids
national geographic science toys stem kits for kids
national geographic science toys stem kits for kids
national geographic science toys stem kits for kids
national geographic science toys stem kits for kids

What's in the box

  • 9 Types of Raw Gemstones (1lb)
  • Courses of polishing grit (4)
  • 5 Jewelry Settings
  • Full Color Learning Guide
  • Looking for specific info?

    Customer reviews

    4.6 out of 5 stars
    5,906 global ratings

    Review this product

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    Customers say

    Customers enjoy the science fundamentals kit for its fun and variety of stones. They appreciate the colorful, gem-quality roughs that turn out nice after polishing. The build quality is good, and the kit is solid. Customers also value the functionality, kit contents, and gift value. However, opinions differ on whether it provides good value for money.

    AI-generated from the text of customer reviews

    93 customers mention "Fun for kids"93 positive0 negative

    Customers enjoy the science fundamentals kit for kids. They find it a fun craft for children interested in rocks and a great summer project. The kit sparks children's imagination and provides some fun jewelry findings.

    "This is ideal for any age. Anyone who is amazed by the polishes rocks in displays. Only negative, is the tumbler is required to run for several days...." Read more

    "...The jewelry settings are rather basic, perfect for children’s activities, but for adult projects it would be better to buy higher quality settings..." Read more

    "Great fir my grandson" Read more

    "It's a gentle way to teach geology to children and leave them with something to show for it...." Read more

    76 customers mention "Variety"69 positive7 negative

    Customers appreciate the variety of stones in the kit. They say it includes three tiger eyes, grit, and different stones for kids to learn about. The set includes agates, gems, and jaspers, including six different kinds of jaspers.

    "Yep box of rocks and aggregate for polishing what could go wrong." Read more

    "Super fun box to receive! There is a pleasing variety of stones in generous sizes, including three tiger eyes (my favorite) and several gorgeous..." Read more

    "I was a bit disappointed with this assortment. The variety is great, and there are some appropriately size rocks like I expected, but at least a..." Read more

    "...He loves rock tumbling. There is a wide variety of stones and we can't wait to get to tumbling." Read more

    64 customers mention "Beauty"64 positive0 negative

    Customers appreciate the beautiful stones and roughs. They mention a nice variety of sizes and colors, and a simple design that is easy to use. Some feel the polishing process was not good.

    "...While loud, it is quiet compared to some other models. Its simple design is easy to use and has been leak and worry free for us for some time..." Read more

    "...far from done tumbling this kit, I can already tell that my stones will all be beautiful...." Read more

    "...I appreciate that I received colorful gem quality roughs, not just a box of cheap colorless quartz. I’m eager to see the final results!..." Read more

    "...There is a nice variety of rocks that are colorful and have a good variety of shapes. I was happy with this purchase." Read more

    45 customers mention "Build quality"34 positive11 negative

    Customers appreciate the build quality of the science fundamentals kit. They find the rocks to tumble in the kit to be good quality, with a generous selection of rough stones. The grit is good, and the gemstones are in their natural unpolished form. The thickness of the rough is nice, and the kit seems well-constructed and put together.

    "...First, I received higher quality stones than expected. Even in their rough states, I could tell that they would all turn out beautiful...." Read more

    "Grandson loved them. Good quality" Read more

    "...Solid kit since it comes with more jewelry and reading." Read more

    "The polish is not a good quality to give a proper shine" Read more

    38 customers mention "Functionality"29 positive9 negative

    Customers appreciate the product's functionality. They say it works well, is easy to use, and meets their requirements. It teaches patience and the results that come from hard work over time.

    "...The results were okay but the rocks were not as shiny as his mother expected. I'm sure it depends on the type of rocks you choose...." Read more

    "...All in all, it works exactly like it should, it’s just a bigger project than we had anticipated." Read more

    "This little thing works Great!! Very impressed! My grandkids love it!" Read more

    "...However, when he went to use it to do a second round of rocks, it keeps stopping. It will turn on and run for about an hour and then turn off...." Read more

    32 customers mention "Kit contents"27 positive5 negative

    Customers appreciate the kit's contents. They say it comes with all the necessary items and accessories. The kit is a great starter or refill kit for rock tumblers, including jewelry making kits and other craft supplies.

    "...It did come with some great pieces, and some smaller pieces that didn't need tumbling, so I think it makes up for it, and of course, my own..." Read more

    "Great starter kit or refill kit for rock tumbler!" Read more

    "...The variety of stones were great and everything necessary was included. Just waiting now for the finished product...." Read more

    "...I am hooked!!! A great starter kit as you really cannot tumble more than 7 rocks 1/2 inch in size BUT that is why it is called a starter kit...." Read more

    28 customers mention "Gift value"28 positive0 negative

    Customers appreciate the gift value of the science fundamentals kit. They mention it's a great idea for small children, and they enjoy the jewelry package that comes with it.

    "...Great extra little gift for Christmas and getting more use out of the tumbler!" Read more

    "Good gift" Read more

    "This is a great gift! My daughter loves her tumbler so I'm always looking for new rocks to tumble, these turned out nice!" Read more

    "For a child this would be an awesome gift but for me not so much. I tumble agates and wanted something different...." Read more

    51 customers mention "Value for money"32 positive19 negative

    Customers have different views on the value for money of the science fundamentals kit. Some find it a good size for the price, while others say it's a waste of money with small rocks not worth tumbling. The tumbler is also mentioned as a disappointment to kids.

    "...Overall I will say that this kit is well worth the price, because after a day of grudging through job and home demands, working with these stones..." Read more

    "...Waste of $ in my opinion." Read more

    "Nice economy kit if you just want to try a sample batch. This was used as a first run in a hand-me-down tumbler and they came out ok...." Read more

    "I love them they are a great size for the price, I'm happy with my order." Read more

    A lot of tiny shards…
    3 out of 5 stars
    A lot of tiny shards…
    I was a bit disappointed with this assortment. The variety is great, and there are some appropriately size rocks like I expected, but at least a good 1/3 to 1/2 the bag is just tiny shards of rocks. As shown in my photo, the right side has good sized rocks, but the other half on the left side has rocks so small that if they were put in a tumbler they would just turn into sand. 😔
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    Top reviews from the United States

    • Reviewed in the United States on March 19, 2024
      Style: Gemstone MixVerified Purchase
      I purchased this for my daughter and together we processed a bunch of stones into nicely polished and rounded gems. I have a high regard for National Geographic branded items, and this is no exception. While loud, it is quiet compared to some other models. Its simple design is easy to use and has been leak and worry free for us for some time already. Very happy with this purchase.
    • Reviewed in the United States on December 28, 2024
      Style: Madagascar MixVerified Purchase
      Yep box of rocks and aggregate for polishing what could go wrong.
    • Reviewed in the United States on January 26, 2025
      Style: Gemstone MixVerified Purchase
      Great refill kit
    • Reviewed in the United States on December 25, 2023
      Style: Gemstone MixVerified Purchase
      This is ideal for any age. Anyone who is amazed by the polishes rocks in displays. Only negative, is the tumbler is required to run for several days. It sounds like a small clothes washer.
      One person found this helpful
      Report
    • Reviewed in the United States on August 21, 2016
      Style: Gemstone MixVerified Purchase
      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.)
      Customer image
      5.0 out of 5 stars
      Breathtaking stones! Expectations blown away.

      Reviewed in the United States on August 21, 2016
      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.)
      Images in this review
      Customer imageCustomer image
      91 people found this helpful
      Report
    • Reviewed in the United States on December 28, 2024
      Style: Agate MixVerified Purchase
      I like the rough agates. This is a gift for my daughter and I'm excited about it!
    • Reviewed in the United States on December 2, 2024
      Style: Gemstone MixVerified Purchase
      Love that I was able to get a refill kit.
    • Reviewed in the United States on February 22, 2018
      Style: Gemstone MixVerified Purchase
      Super fun box to receive! There is a pleasing variety of stones in generous sizes, including three tiger eyes (my favorite) and several gorgeous agates. I appreciate that I received colorful gem quality roughs, not just a box of cheap colorless quartz. I’m eager to see the final results! Loading up the tumbler today! Although I already had some grit on hand, I appreciate the grit set included in the box. You can never have too much. The jewelry settings are rather basic, perfect for children’s activities, but for adult projects it would be better to buy higher quality settings at a craft store. Glue is not included. You will need to buy some. And the gem booklet is very informative. Overall I will say that this kit is well worth the price, because after a day of grudging through job and home demands, working with these stones puts a smile on my face. And that’s worth a lot!
      Customer image
      5.0 out of 5 stars
      Gorgeous stones!

      Reviewed in the United States on February 22, 2018
      Super fun box to receive! There is a pleasing variety of stones in generous sizes, including three tiger eyes (my favorite) and several gorgeous agates. I appreciate that I received colorful gem quality roughs, not just a box of cheap colorless quartz. I’m eager to see the final results! Loading up the tumbler today! Although I already had some grit on hand, I appreciate the grit set included in the box. You can never have too much. The jewelry settings are rather basic, perfect for children’s activities, but for adult projects it would be better to buy higher quality settings at a craft store. Glue is not included. You will need to buy some. And the gem booklet is very informative. Overall I will say that this kit is well worth the price, because after a day of grudging through job and home demands, working with these stones puts a smile on my face. And that’s worth a lot!
      Images in this review
      Customer image
      10 people found this helpful
      Report

    Top reviews from other countries

    Translate all reviews to English
    • aliya
      5.0 out of 5 stars Love it
      Reviewed in Canada on December 10, 2024
      Style: Gemstone MixVerified Purchase
      Love it. Bought this a year ago and. I still have it. Works great
    • Sylvia
      5.0 out of 5 stars Beautiful stones
      Reviewed in Canada on July 16, 2023
      Style: Agate MixVerified Purchase
      These stones polished up nice and it was great seeing them all the stages of tumbling. Recommend for all ages.
    • John Davis
      5.0 out of 5 stars A Really Interesting Hobby
      Reviewed in the United Kingdom on July 24, 2023
      Style: Gemstone MixVerified Purchase
      Very well produced and well packed. Comprehensive kit, with easy to follow instructions, making it easy to use and set up. One thing I didn't realise was it would take so long to produce the finished items. Each stage, there are five, takes several days to run. So don't expect rapid results. It is worth the wait for the drum to stop turning, seeing the magical change in the stones is wonderful. Great piece of kit and glad I bought it. Grandchildren love it.
    • Client d'Amazon
      5.0 out of 5 stars Un cadeau pour les futur passionnés
      Reviewed in France on August 26, 2021
      Style: Jasper MixVerified Purchase
      Voilà une idée de cadeau qui apprend la patience aux enfants en même temps qu’elle développe leur curiosité
    • Julio
      1.0 out of 5 stars Mala cmpra
      Reviewed in Spain on June 18, 2021
      Style: Jasper MixVerified Purchase
      SIN LA NAQUINA DE PULIR NO SIRVE PARA NADA.