Can you use this for a 1 lb National Geographic tumbler

It should work just fine. This is just the grit and the grit is usable in any tumbler.

After the polish, are the rocks glossy and shiny?

They won't be as shiny as you think. The grit polish the rocks so try are smooth but there is a fifth stage in rock polishing called burnishing that you have to do at the end. Search the internet on directions but it involves tumbling them in soap like borax. Also, if you want your rocks to look good you have to get the ceramic filler pellets to even out the tumbles. Plastic doesn't do the trick like ceramic. Filler pellets vs no filler pellets is a big difference on helping the rocks get shiny.

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Rock Tumbler Grit Kit Refill for 3lb Tumblers, 4 Step Silicon Carbide & 12,000 Grit Aluminum Oxide Polish, Stone Polishing Kit for Rotary & Vibratory Rock Tumblers

Product ID: 77741296

Details

Brand
MJR Tumblers
Grit Material
Aluminum
Grit Type
Coarse; Fine;
Item dimensions L x W x H
8 x 6 x 0.4
Material
Aluminum Oxide

🔄compatible with rotary & vibratory tumblers

⚙️4-stage precision grit system

🇺🇸USA veteran-owned quality brand

152.31 DT

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Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💎 Elevate your rock game—shine like the pros do!

FLAWLESS 4 STEP POLISH - From rough to mirror-smooth with coarse to ultra-fine 12,000 grit stages
PRE MEASURED PERFECTION - Exact doses for 6lb tumblers—no guesswork, just results
EFFORTLESS ROCK TRANSFORMATION - Turn raw stones into polished gems with minimal effort
UNIVERSAL TUMBLER COMPATIBILITY - Seamlessly works with both rotary and vibratory models
VETERAN OWNED QUALITY ASSURANCE - Crafted by a USA-based disabled veteran brand you can trust

The MJR Tumblers Rock Tumbler Grit Kit Refill is a complete 4-stage polishing system designed for 6lb rock tumblers. Featuring silicon carbide grits and a premium 12,000 grit aluminum oxide polish, it delivers professional-grade smoothness compatible with rotary and vibratory tumblers. Proudly made by a USA veteran-owned company, this kit simplifies rock polishing with pre-measured doses for consistent, high-quality results.

Specifications

ASIN	B07DZ54NQN
Best Sellers Rank	#25,005 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #21 in Tumbling Media
Brand Name	MJR Tumblers
Compatible Material	Aluminum Oxide; Silicon Carbide
Customer Reviews	4.5 4.5 out of 5 stars (1,324)
Grit Material Type	Aluminum Oxide; Silicon Carbide
Grit Number	12000
Grit Type	Coarse; Fine; Pre Polish; Polish
Item Dimensions	8 x 6 x 0.4 inches
Item Weight	8.96 ounces
Manufacturer	MJR Tumblers
Material Type	Aluminum Oxide, Plastic Pellets, Silicon Carbide
Model	MJR3pgk
Number of Items	4
Part Number	MJR3pgk
Set Name	4-Stage Rock Tumbler Grit Kit
Unit Count	4 Count

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