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NATIONAL GEOGRAPHIC Rock Tumbler Grit & Media Refill Kit – Rock Polishing Supplies Kit, 4-Stage Silicon Carbide Bulk Grit, 1.5 Pounds of Ceramic Pellets, Stone Tumbling & GemFoam Polishing Media
✅ In stock
F
Grade
Analysis Confidence
100%
⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.
Check Deal at Amazon
Price verified Sep 21, 2026 9:49 AM · Prices & availability subject to change
Is This a Good Price on Amazon?
💤 Not a Deal- 💤Verdict: Not a Deal. Price is at or above historical norms. Best to wait for a sale.
- 💰The current price is slightly above the going rate for this product — worth watching for a drop.
- 🏷️A 33% cut from the official retail price adds further appeal.
- 📉Pricing has not dipped this low in roughly six months, placing this offer among the better deals in that window.
- ➡️Pricing has held fairly steady, with no strong push in either direction.
How We Scored This Deal
Price Competitiveness
0/28
Recent Value
0/22
Market Standing
0.07/20
Deal Strength
10/20
Momentum
4/10
📝 Product Overview
🏪 Sold by
Amazon.com
🚚 Shipping
Free Shipping
Product Details
✓QUALITY RESULTS AND DAZZLING POLISH - The rock polishing grit in this pack is high-quality silicon carbide and will polish 8-10 lbs of rocks. Includes measuring scoop and storage containers with secure screw-top closures for easy storage.
✓IMPROVE YOUR ROCK TUMBLING RESULTS – Ceramic tumbler media makes the entire rock tumbling process more effective, improving delivery of rock tumbling grit, quieting tumbler noise, reducing rock breakage, and acting as a filler for smaller batches.
✓PATENTED WAY TO MAKE TUMBLED ROCKS SHINE – GemFoam is a unique, patented rock polisher media that gives unprecedented shine to tumbled rocks. Just add GemFoam to your tumbler after the final grit cycle for great results!
✓WORKS WITH ANY ROCK TUMBLER – The tumbling supplies in this set are safe to use with any rock tumbler. The tumbling grit, ceramic pellets, and GemFoam together improve rock tumbling performance and yield impressive results.
✓AMAZON EXCLUSIVE - Blue Marble has developed this product exclusively for Amazon.
✓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!
⚙️ Specifications
7.48 x 5.31 x 5.51 inches
5.55 pounds
B08B7GRBK6
4.7
8 years and up
See Top 100 in Industrial & Scientific
September 17, 2021
JMW Sales, Inc.
Product Dimensions
7.48 x 5.32 x 5.47 inches
Item Weight
5.55 pounds
ASIN
B08B7GRBK6
Item model number
NGFOMCERGRIT
Manufacturer recommended age
8 years and up
Best Sellers Rank
See Top 100 in Industrial & Scientific
Customer Reviews
4.7
