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

✨ Turn raw stones into dazzling treasures—because your desk deserves a glow-up!

STEM MEETS STYLE - Learn geology hands-on while crafting unique jewelry gifts that scream ‘I made this.’
POLISH LIKE A PRO - 4-stage precision grit system sculpts and polishes rocks to museum-quality shine.
SILENT SMOOTH TUMBLING - Ceramic media reduces noise and rock breakage, making your workspace zen-worthy.
NEXT LEVEL SHINE WITH GEM FOAM - Patent-pending polishing foam delivers an unprecedented, eye-catching sparkle.
AUTHENTIC MADAGASCAR COLLECTION - 3 pounds of rare rose quartz, jasper, and more—rocks you’ll actually want to show off.

The National Geographic Complete Starter Kit offers a premium 4-stage silicon carbide grit polishing system, 3 pounds of authentic Madagascar rocks, and 1.5 pounds of ceramic media to optimize tumbling efficiency and reduce noise. Featuring the innovative GemFoam polishing media, this kit guarantees museum-quality shine and hands-on STEM learning for ages 8 and up. Perfect for hobbyists and professionals aiming to create stunning polished stones and custom jewelry.

Specifications

Product Dimensions	25 x 18 x 14 cm; 1.36 kg
Manufacturer recommended age	8 years and up
Item model number	NGFOMCERGRTMD
Educational Objective(s)	Learn About Geology
Language:	English
Number of Puzzle Pieces	1
Assembly Required	No
Batteries Required?	No
Batteries Included?	No
tech_spec_battery_description_toys	No batteries required
Material Type(s)	Rocks, Silicon Carbide, Ceramic, GemFoam, Metal
Material Care Instructions	Hand Wash Only
Remote Control Included?	No
Radio Control Suitability	Travel, Home
Color	multicoloured
Language	English
ASIN	B08B7JBVG9

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