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 Refill Kit – Rock Tumbling Supplies Including Rock Tumbler Grit and Polish Refill, Ceramic Media, GemFoam, 3 lbs Madagascar Rocks for Tumbling, Jewelry Accessories

National Geographic Rock Tumbler Refill Kit – Rock Tumbling Supplies Including Rock Tumbler Grit and Polish Refill, Ceramic Media, GemFoam, 3 lbs Madagascar Rocks for Tumbling, Jewelry Accessories

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 authentic Madagascar rocks

⚙️High-grade silicon carbide grit

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Description

✨ Rock your world with brilliance and style 🪨

NOISE REDUCING CERAMIC MEDIA - Ceramic filler media minimizes tumbler noise and rock breakage, making your creative process smoother and more enjoyable.
REVOLUTIONARY GEM FOAM POLISH - Patent-pending GemFoam media adds an unprecedented sparkle after the final grit cycle—your rocks will literally shine brighter than your peers'.
AUTHENTIC MADAGASCAR ROCK MIX - Includes 3 lbs of exotic rose quartz, jasper, and more—perfect for creating unique, envy-inducing collections or jewelry.
GEMSTONE GRADE POLISH EVERY TIME - Premium silicon carbide grit delivers a dazzling, museum-quality shine that turns ordinary rocks into conversation starters.
STEM APPROVED SATISFACTION GUARANTEED - Backed by National Geographic’s trusted STEM series, this kit combines education with fun, ensuring you never miss out on the ultimate rock tumbling experience.

The National Geographic Rock Tumbler Refill Kit is a complete, high-quality rock polishing set featuring 3 pounds of authentic Madagascar rocks, premium silicon carbide grit, ceramic media to reduce noise and breakage, and innovative GemFoam polish for unmatched shine. Designed for ages 8 and up, this STEM-backed kit offers an educational and fun lapidary experience, perfect for hobbyists and jewelry makers seeking professional-grade results.

Specifications

ASIN	B08B7JBVG9
Age Range Description	8 years and up
Best Sellers Rank	#1,573 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Tumbling Media
Brand Name	Blue Marble
Customer Reviews	4.7 4.7 out of 5 stars (18,618)
Educational Objective	Learn About Geology
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
Is Assembly Required	No
Item Dimensions	9.84 x 7.09 x 5.51 inches
Item Type Name	Complete Rock Polisher Tumbler Media Kit
Item Weight	3 Pounds
Manufacturer	JMW Sales, Inc.
Manufacturer Maximum Age (MONTHS)	1188.0
Manufacturer Minimum Age (MONTHS)	96.0
Manufacturer Part Number	NGFOMCERGRTMD
Manufacturer Warranty Description	We're proud to make the highest quality products which are backed by exceptional service.
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	Medium
Supported Battery Types	No batteries required
Theme	media
UPC	816448027505
Unit Count	1.0 Count

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