Can Gemfoam be purchased separately?

Yes, we do sell the Polishing Foam separately.

What is the difference between this and product # ngbulkgrit?

Thank you so much for your inquiry. This item (the Complete Media Kit) contains the grit along with GemFoam to assist in the polishing stage and Ceramic Pellets to reduce rock breakage along with making the tumbling process more quiet. The Bulk Grit does not contain the GemFoam or pellets, but does contain the grit.

How much of each medium is included in this accessories set?

The jars shown hold approximately 2/3 of a cup, so plan on buying bulk bags in the near future.

My lid cracked and i need a new one. Are there replacement parts avaliable to buy?

Not sure if you are referring to the tumbler canister lid but you will find replacement parts on Ebay under rock tumbler parts

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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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

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

Product ID: 394896877

✨Patent-pending GemFoam for dazzling shine

🪨1.5 lbs ceramic media reduces breakage & noise

⚙️4-stage silicon carbide grit for precision polishing

Description

✨ Turn rough stones into polished gems—because your collection deserves to shine!

GEM FOAM BRILLIANCE - Add the patented GemFoam for an unmatched, showroom-quality polish every time.
CERAMIC MEDIA MAGIC - Quiet, efficient tumbling with less rock breakage and perfect filler for small batches.
AWARD WINNING QUALITY - Backed by National Geographic and Toy of the Year-winning innovation for STEM excellence.
UNIVERSAL COMPATIBILITY - Works seamlessly with any rock tumbler—upgrade your setup without limits.
PRECISION 4 STAGE POLISHING - From rough to radiant—silicon carbide grit sculpts and shines every stone.

The National Geographic Rock Tumbler Grit & Media Refill Kit includes a complete 4-stage silicon carbide grit system, 1.5 pounds of ceramic tumbling media, and patented GemFoam polishing media. Designed to enhance rock tumbling efficiency by reducing noise and breakage, this kit delivers professional-grade polish compatible with all rock tumblers. Ideal for STEM learning and creative exploration, it’s a trusted, award-winning solution for turning raw stones into dazzling gems.

Specifications

ASIN	B08B7GRBK6
Age Range Description	8 years and up
Battery Types	No batteries required
Brand	Blue Marble
Character	Quarter
Colour	Black
Country of Origin	USA
Customer Reviews	4.6 4.6 out of 5 stars (2,093)
Educational Objective	STEM
Global Trade Identification Number	00816448027512
Indoor Outdoor Usage	Indoor
Is Assembly Required	No
Item Dimensions	19 x 13.5 x 13.9 Centimeters
Manufacturer	JMW Sales, Inc.
Manufacturer Part Number	NGFOMCERGRIT
Manufacturer recommended age	8 years and up
Material	Glass,Gems
Model Number	NGFOMCERGRIT
Number of Packs	1
Number of Players	1
Operation Mode	Manual
Power Source	mechanical
Set Name	Rock Tumbler Grit & Media Refill Kit (4-Stage Grit, 1.5 Pounds Ceramic Pellets, 30g GemFoam)
Size	Small
Sub Brand	National Geographic
Theme	Science
UPC	816448027512
Unit Count	1 Count

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