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 Grit and Rock Polishing Refill Kit | 3 Lbs. Madagascar Rocks, 4-Stage Grit and Polish, Ceramic Media, GemFoam Polish, Jewelry Accessories, Rock Polishing

Product ID: 219416282

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 for smooth tumbling

🪨3 lbs Madagascar rock mix

⚙️4-stage silicon carbide grit polish

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Description

✨ Transform Rough Rocks into Radiant Gems 🪨

NEXT LEVEL SHINE - GemFoam polish adds an unprecedented luster that will make your rocks the envy of every collector.
DAZZLE LIKE A PRO - High-quality silicon carbide grit delivers a brilliant, museum-worthy polish every time.
EXOTIC MADAGASCAR MIX - 3 pounds of authentic rose quartz, jasper, and gemstones to keep your collection fresh and unique.
AWARD WINNING STEM FUN - Backed by Toy of the Year winner Blue Marble, this kit inspires creativity and scientific curiosity for ages 8+.
WHISPER QUIET PRECISION - Ceramic media reduces noise and rock breakage, making your tumbling process smoother and more efficient.

The National Geographic Rock Tumbler Refill Kit includes 3 lbs of authentic Madagascar rocks, a 4-stage silicon carbide grit polishing system, 1.5 lbs of ceramic media to enhance tumbling efficiency, and innovative GemFoam polish for superior shine. Designed for ages 8 and up, this award-winning STEM kit combines quality materials and expert design to deliver professional-grade rock polishing results with reduced noise and breakage.

Specifications

ASIN	B08B7JBVG9
Age Range Description	8 years and up
Best Sellers Rank	#1,874 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Tumbling Media
Brand Name	Blue Marble
Color	Multicolor
Customer Reviews	4.7 4.7 out of 5 stars (927)
Educational Objective	STEM
Global Trade Identification Number	00816448027505
Included Components	1.5 pounds of Ceramic Media, 10 mL Grit Scoop, 3 Pound Madagascar Rock Refill Mix, 30 g GemFoam, 4 Stages of Silicon Carbide Polishing Grit Compound, Detailed Learning Guide with Instructions, Jewelry Fastenings
Indoor Outdoor Usage	Indoor
Item Dimensions	9.84 x 7.09 x 5.51 inches
Item Highlight	3 Lbs. Madagascar Rocks, 4-Stage Grit and Polish, Ceramic Media, GemFoam Polish, Jewelry Accessories, Rock Polishing
Item Type Name	Complete Rock Polisher Tumbler Media Kit
Item Weight	3 pounds
Manufacturer	JMW Sales, Inc.
Manufacturer Part Number	NGFOMCERGRTMD
Manufacturer Warranty Description	We're proud to make the highest quality products which are backed by exceptional service.
Manufacturer recommended age	8 years and up
Material Type	Rocks, Silicon Carbide, Ceramic, GemFoam, Metal
Model Number	NGFOMCERGRTMD
Operation Mode	Manual
Set Name	Complete Rock Polisher Tumbler Media Kit (7 Items)
Size	One Size
Sub Brand	National Geographic
Supported Battery Types	No batteries required
Theme	Rock Tumbling
UPC	816448027505
Unit Count	1 Count

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89785CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered 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 Senegal.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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