How many oz is in each container?

1 Coarse-16oz. 2 Medium-13oz. 3 Pre-polish-12oz. 4 Polish-11.5 oz.

I just opened this and finished with grit one, went to put grit 2 in and bottle open and 1/2 full. How do I contact seller?

I would go through Amazon to get an answer for your problem.

Can it be used together ?

Each grit is a different fineness intended for a specific purpose. We do not recommend using them at the same time. We do recommend 1 TBS grit per per 1 LB rocks, at each cycle. For further information please contact us at help@natgeotoys.com.

After each step for the rocks in the kit, my rocks dry with a dull white finish. It doesn't show when it is wet. Am I doing something wrong?

No. I find that after tumbling with the finest grit after the last step... and thoroughly allowing the rocks to dry, a nice coat of wax or oil brings out the color beautifully.

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NATIONAL GEOGRAPHIC Rock Tumbler Media ââ‚¬â€œ Rock Polisher Tumbler Kit, 4 Stage Rock Tumbler Grit and Polish, Ceramic Pellets, GemFoam Polishing Foam, 3 lbs Madagascar Rocks, Great for All Rock Tumblers

Product ID: 342235118

Details

Brand
Blue Marble
Style
Complete Kit
Theme
media
Recommended Uses For Product
Travel Home
Included Components
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🧱1.5 lbs Ceramic Media

🪨3 lbs Madagascar Rocks

⚙️4-stage Silicon Carbide Grit

$219.47

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Sold byAmazon British Virgin IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

✨ Transform ordinary rocks into dazzling gems — polish like a pro! 🪨

EXOTIC ROCK VARIETY - 3 lbs of authentic Madagascar stones including rose quartz and jasper for unique, Instagram-worthy collections.
AWARD WINNING STEM FUN - Backed by National Geographic and Toy of the Year winner Blue Marble, perfect for creative professionals and hobbyists alike.
PRECISION POLISHING POWER - 4-stage silicon carbide grit delivers a flawless, museum-quality shine every time.
SILENT SMOOTH OPERATION - Ceramic media reduces noise and rock breakage, making your tumbling experience seamless and stress-free.
NEXT LEVEL SHINE WITH GEM FOAM - Patent-pending GemFoam polishing media adds an unprecedented, eye-catching luster to your stones.

The National Geographic Rock Tumbler Media Kit is a comprehensive 4-stage polishing system featuring high-quality silicon carbide grit, 3 pounds of authentic Madagascar rocks, and 1.5 pounds of ceramic media to enhance tumbling efficiency and reduce noise. Its innovative GemFoam polishing media delivers an unmatched shine, making it ideal for both beginners and seasoned rock enthusiasts. Developed by award-winning Blue Marble and supported by National Geographic, this kit combines STEM education with hands-on creativity for a premium rock tumbling experience.

Specifications

ASIN	B08B7JBVG9
Age Range Description	Kid
Battery Types	No batteries required
Brand	Blue Marble
Colour	Multicolor
Customer Reviews	4.6 4.6 out of 5 stars (893)
Educational Objective	STEM
Global Trade Identification Number	00816448027505
Indoor Outdoor Usage	Indoor
Is Assembly Required	No
Item Dimensions	25 x 18 x 14 Centimeters
Item Weight	1.36 kg
Manufacturer	JMW Sales, Inc.
Manufacturer Part Number	NGFOMCERGRTMD
Manufacturer recommended age	8 years and up
Material	Rocks, Silicon Carbide, Ceramic, GemFoam, Metal
Model Number	NGFOMCERGRTMD
Operation Mode	Manual
Set Name	Mega Rock Media Kit
Size	One Size
Sub Brand	National Geographic
Theme	Rock Tumbling
UPC	816448027505
Unit Count	1 Count

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$219.47

Duties & taxes included

In stock

Sold byAmazon British Virgin IslandsDelivered 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 British Virgin Islands.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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

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