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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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: 222518474

✨Patented GemFoam media for unmatched rock shine

🪨1.5 lbs ceramic pellets reduce breakage & noise

⚙️4-stage silicon carbide grit for precision polish

$138.15

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Description

✨ Turn rough stones into polished gems—because your collection deserves the spotlight!

CERAMIC MEDIA MAGIC - Quiet your tumbler and protect your stones with 1.5 lbs of premium ceramic pellets.
GEM FOAM SHINE BOOSTER - Add the patented GemFoam for a dazzling, showroom-worthy finish every time.
UNIVERSAL COMPATIBILITY - Works seamlessly with any rock tumbler—upgrade your setup without hassle.
AWARD WINNING STEM INNOVATION - From the makers of Toy of the Year, designed to inspire creativity and scientific curiosity.
PRECISION 4 STAGE GRIT SYSTEM - Achieve museum-quality polish with industrial-grade silicon carbide grit.

The NATIONAL GEOGRAPHIC Rock Tumbler Grit & Media Refill Kit includes a complete 4-stage silicon carbide grit system, 1.5 pounds of ceramic pellets to reduce noise and breakage, and patented GemFoam polishing media for superior shine. Compatible with all rock tumblers, this award-winning kit is designed to deliver professional-grade results and inspire STEM learning for ages 8 and up.

Specifications

ASIN	B08B7GRBK6
Age Range Description	8 years and up
Best Sellers Rank	#1,370 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Tumbling Media
Brand Name	Blue Marble
Color	Black
Customer Reviews	4.7 out of 5 stars 18,709 Reviews
Educational Objective	STEM
Global Trade Identification Number	00816448027512
Included Components	1.5 Pounds of Ceramic Media, 10 mL Scoop, 30 g GemFoam, 4 Stages of Silicon Carbide Polishing Grit Compound
Indoor Outdoor Usage	Indoor
Is Assembly Required	No
Item Dimensions	7.48 x 5.32 x 5.47 inches
Item Type Name	Ultimate Rock Polishing Supplies Kit
Manufacturer	JMW Sales, Inc.
Manufacturer Maximum Age (MONTHS)	1188
Manufacturer Minimum Age (MONTHS)	96
Manufacturer Part Number	NGFOMCERGRIT
Material Type	Rock
Model Number	NGFOMCERGRIT
Number of Players	1
Operation Mode	Manual
Power Source	AC adapter
Set Name	Ultimate Rock Polishing Supplies Kit
Size	Medium
Sub Brand	National Geographic
Subject Character	Quarter
Supported Battery Types	No batteries required
Theme	Science
UPC	816448027512
Unit Count	1 Count

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$138.15

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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