Can I use this with my handheld rotary tool as a polishing compound?

Yes, some people use it as a polishing compound and rub it by hand or with a tool.

Do I still use water?

Yes. Put your rocks in tumbler. Add 1.5 tbs of Step 4 grit per lb of rocks. Then put water in the barrel to cover the rocks. Keep the total contents of the barrel to about 2/3 full.

Is this pure aluminum oxide powder or are there additional elements mixed in?

Analysis shows over 99% aluminum oxide, along with traces of a few other compounds.

can this be used dry in a vibratory tumbler?

People use this tumbling media both in rotary and vibratory tumblers. We have only heard of using it with water so we're not positive about how to use it dry.

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Description

✨ Polish Like a Pro with Polly Plastics! ✨

MESS FREE MAGIC - Durable, reusable jars keep your workspace tidy.
BEGINNER FRIENDLY - 100% satisfaction guarantee ensures a worry-free experience.
QUALITY YOU CAN TRUST - Proudly made in the USA for superior quality control.
UNIVERSAL COMPATIBILITY - Works seamlessly with all major rock tumblers.
TRANSFORM YOUR TREASURES - Achieve a stunning finish with our Stage 4 polish!

The Polly Plastics Rock Tumbler Grit Refill is the ultimate Stage 4 media grit for transforming your rocks and gemstones into stunning treasures. This 1 lb. pack includes two 1/2 lb. jars of Final Polish 1200 Fine Aluminum Oxide, compatible with all major rock tumblers. Packaged in durable, reusable jars, this product is made in the USA, ensuring top-notch quality and safety.

Reviews

T**B

Good grit

This grit worked great for my first ever Columbia river rock polishing experiment. I didn't have enough stage 1 grit from the "starter" pack I originally purchased. I added another 3 TBSP to my tumbler and the rocks look great at stage 1

22.08.2025

M**E

Best rock tumbling grits on Amazon

I have been rock tumbling for over two years now and I have purchased this brand multiple times and will continue to be a return customer. The grits work exactly as expected for each stage of tumbling. Important notes:- Get the one that has the ceramic filler - not the plastics. The ceramic will last way longer and be better on your rocks.- Also - watch some YouTube videos on how to tumble rocks and switch between stages. There's some important tips to make sure you get the best results. Michigan Rocks YouTube channel has some great instructions on it.For the price and quality, couldn't be happier.

19.05.2025

B**2

Best stage 4 grit for the $ on Amazon.

Shines up rocks with ease. If your a rock collecting nut that loves to polish rocks like me, this is some of the best prices and available stage 4 polishing compound on Amazon. Batch after batch, I’ve gotten consistent results from Poly Plastics grits.

14.07.2025

G**S

Ok, but not great

See title

29.03.2025

C**P

Nice product

Shiny me and Mira shiny I loved it

11.06.2025

R**.

Good price

Working well

20.07.2025

C**.

Don’t go cheap on stage four!

Poly Plastics saves the Day! I had a pile of failed stage 4 batches collecting from poor quality polish. One week tumbling cycle with your polish turned them all brilliantly glossy. I’m relieved and happy to have found this product.

28.07.2025

D**N

Value

It works great!!!

30.06.2025

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