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Your cart is empty.Buy American! 5lb of MJR Tumblers Premium 1200 Aluminum Oxide Rock Polishing Grit for Step / Stage 4, MJR Tumblers is a Disabled and Veteran Owned Company Proudly Located in USA
Ginger Boone
Reviewed in the United States on May 9, 2023
I ran step 4/polish twice, blamed myself, went back and ran step 3/pre- polish again, then step 4/polish 2 more times. Bought new pellets, cleaned my tumbler really good. Still matte finish on my rocks. I decided I wasn’t going to waste any more time, effort, or expensive grit till I figured out my problem. I finally gave up. I wish I’d read these reviews sooner. I ordered from Rock Shed like someone recommended. I’m now tumbling this same load (rocks are getting smaller and smaller) that I started step 1 in beginning in October of 2021. Hope new stuff works. Never buying from this place again.
Sonofthe Anonymousman
Reviewed in the United States on October 30, 2023
This is the most expensive dirt I've ever bought. I am no rookie at tumbling stones and this material will not put a gloss to even obsidian. I've tried every variation I can think of. I have even tried one stone at a time in a Thumler that has yielded lots of gloss. I suggest buying elsewhere.
Matt O.
Reviewed in the United States on September 21, 2022
This is ill listed to be polish, but it is not. It can be considered a prepolish, and you can find better prices elsewhere.I ran my tumbler for more than a week with this grit after 500 silicone carbide and the rocks still came out flat matte. I would have continued tumbling if the pieces weren't sensitive to being worn away (the rocks are quartz and had been cut to shapes, i dont want the corners completely rounded off).I am now looking for a real polish. This listing is a borderline scam that preys on inexperienced rock tumblers.
Josh
Reviewed in the United States on August 20, 2022
I’ve used this as a stage 4 polish for about 10 batches of rocks on my rotary tumblers, and have not once achieved a shiny polish on any batch. I wish I had read all the other similar reviews before I wasted my money on this useless product. I’ll be switching back to my old brand.
Christopher Finifrock
Reviewed in the United States on November 24, 2021
This is the best polish I have ever used. Works great!
JosT
Reviewed in the United States on January 30, 2021
If you use this as a step four then you need to continue with a step five. We tumbled six different types of rocks using this and every one of them never polished and were always dull. Use cerium oxide since it is a true final polish, this grit is a pre-polish and waste of time after 400.
skewedsire
Reviewed in the United States on January 18, 2021
I purchased this 5Lb polish back in July. It came in individual 1Lb bags. I still had some Rock Shed Aluminum Oxide polish so I didn't start using this polish right away.My first batch using the MJR polish came out looking the same as it did after the 500 Grit pre-polish, so I thought I'd just got some contaminate from the previous stage.My second batch (after 1 week tumble) came out the same, so I ran it for another week, then two. It did get smoother, but no shiny lusterCompared to the Rock Shed polish this is denser, 3T =4T by weight. It acts a lot like Silicon Carbide grit, I get the same sort of results using 1500 SiC fine grit. So if you want a polish to give shine and luster to agates, look elsewhere. If you want a less expensive fine grit, maybe this works for you.
Ronald Grenadier
Reviewed in the United States on December 20, 2020
GOOD FOR TUMBLING ROCKS
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