MJR Tumblers 1 Pound 36 Silicon Carbide Rock Grit Extra Coarse

Not that good.

So frustrating!!! I was so excited to open the tumbler after the final polish, only to find dull rocks. I used this brand a few years ago and was disappointed. I ordered it again by mistake but figured I would give it another try. TERRIBLE! Such a waste of money!!! I am having to repeat the polish stage with a different brand and wait another week.

its grit all 60/90 grit is the same

Received as advertised, and timely.

. Breaks down too soon. no trace after 36 hrs of tumbling.

It is pricey. Worked ok but not that much better than the 90 grit which is much less expensive

it does the job pretty good, I use it in a tumbler to sand large pieces instead to have to sand by hand.

Great product I would definitely buy again

I ended up using this as a stage 3, seeing I ruined 3 stage 4 tumbles,

its grit all 60/90 grit is the same