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Product Description
This grit is perfect for use with rock tumblers of any brand!Take your stones from rough rocks to polished gemstones in just 4 easy tumbling step using National Geographic's Grit Refill (Rock tumbler required and sold separately).
This product contains:
- 4 stages of grit in easily resealable containers
- 3.28 lbs of grit, enough grit for about 8-10 pounds of rocks.
National Geographic Toys is proud to provide a 100% satisfaction guarantee with all our products so that you can buy with confidence.
About the National Geographic Society: With a mission to inspire people to care about the planet, the 131-year-old National Geographic Society is one of the world’s largest nonprofit scientific and educational organizations.
National Geographic’s net proceeds support vital exploration, conservation, research, and education programs.
Features
- HIGH QUALITY - This rock polisher grit refill pack comes with enough high-quality silicon carbide grit to put a dazzling polish on up to 20 lbs. of rocks, gems, glass, and more!
- EASY TO USE, FOUR-STAGE ROCK GRIT - The first rock tumbling grit stage provides initial shaping, the second smooths rock surfaces, the third pre-polishes rocks, and the fourth provides the final polish!
- COMPATIBLE WITH ALL TUMBLERS - This complete 4-step rock tumbler grit refill kit works with all rock tumblers. For best results, use with National Geographic Rock Tumblers and rock tumbling supplies.
- EASY TO MEASURE AND STORE - Each rock tumbling grit stage is packaged in a wide-mouth container with secure, screw-top closure.
- AWARD-WINNING PRODUCTS - Blue Marble, winner of the Toy Association's prestigious Toy of the Year Award, proudly develops products that foster education, imagination, and creativity, with a U.S. support team to ensure a stellar experience!
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Details were last updated on Jan 13, 2026 06:19 +08.
