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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Description

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

BULK POWER PACK - 1.49kg of premium silicon carbide grit polishes up to 9 kg of stones and gems.
4 STAGE GRIT MASTERY - From rough shaping to mirror polish, every step engineered for perfection.
UNIVERSAL COMPATIBILITY - Seamlessly works with all rock tumblers—maximize your polishing potential.
EFFORTLESS STORAGE USE - Wide-mouth, screw-top containers keep grit fresh and easy to measure.
STEM APPROVED EDUCATIONAL FUN - Hands-on science meets stunning results—perfect for curious minds 8+.

The NATIONAL GEOGRAPHIC Rock Tumbler Grit is a high-quality 4-stage silicon carbide grit kit designed to polish up to 9 kg of rocks, gems, and glass. Compatible with all rock tumblers, it features easy-to-use, securely packaged grit stages that deliver professional-grade results while promoting geological learning for ages 8 and up.

Specifications

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)	Promote geological knowledge and provide practical learning experiences related to rocks and minerals
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)	Carbide of Silicon
Remote Control Included?	No
Colour	Black
Release date	9 Aug. 2017
ASIN	B01MRKI4W0

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37552 som

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NATIONAL GEOGRAPHIC Rock Tumbler Grit - 1.49kg Polishing Grit Media for Any Rock Tumbler, Rock & Stone Polisher, Polishes 3.63 - 4.54kg of Rocks

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