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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✨ Transform Rough Rocks into Polished Masterpieces ⚙️

UNIVERSAL COMPATIBILITY - Works seamlessly with any rock tumbler, maximizing your investment and versatility.
EASY MEASUREMENT STORAGE - Wide-mouth containers with screw-top lids and a 10 mL scoop ensure mess-free, accurate grit dosing every time.
PRECISION 4 STAGE POLISHING - From rough shaping to mirror finish, each grit stage is engineered for flawless rock transformation.
BULK SUPPLY FOR BIG PROJECTS - 1.5 kg of premium grit lets you polish up to 10 lbs of stones, gems, or glass—perfect for serious hobbyists.
STEM BACKED QUALITY SUPPORT - National Geographic’s trusted STEM series guarantees top-tier materials and customer satisfaction.

The Blue Marble National Geographic Bulk Grit Media is a high-quality, 4-stage silicon carbide grit kit designed to polish up to 10 lbs of rocks, gems, and glass. Compatible with all rock tumblers, it includes easy-to-use containers and a measuring scoop, delivering professional-grade results for hobbyists and STEM enthusiasts alike.

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

€ 88.10

Duties & taxes incl.

Slovakiastore

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Product Dimensions	13.97 x 13.97 x 10.8 cm; 1.78 kg
Manufacturer recommended age	8 years and up
Item model number	NGBULKGRIT
Educational Objective(s)	Learn About Rock Tumbling
Language:	English
Number of Game Players	1
Assembly Required	No
Batteries Required?	Yes
Batteries Included?	No
tech_spec_battery_description_toys	No batteries required
Material Type(s)	glass, glass quartz glass carbide
Remote Control Included?	No
Radio Control Suitability	home
Color	Black
Language	English
ASIN	B01MRKI4W0

Blue Marble National Geographic (Bulk Grit Media) - Rock Tumbler Grit - 1.5kgs Rock Polishing Grit Media, Works with any Rock Tumbler, Rock Polisher, Stone Polisher, Polishes 8-4.5kg of Rocks

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