RockTumbler logo
McAfee SECURE
sites help keep you safe from identity theft, credit card fraud, spyware,
spam, viruses and online scams
 Home » Rock Tumbling Supplies » Rock Tumbler Grit

Rock Tumbler Grit





Rock tumbling grit
"Tumbler grit" is a silicon carbide powder that is much harder than the types of rocks that are commonly tumbled. If it is tumbled in a barrel with rock and water the abrasion caused by the grit particles rounds the sharp edges off of the rocks. We use about four tablespoons of grit in a three-pound capacity tumbler barrel.


Individual Grits


Coarse grit for rock tumblers
60/90 Grit - STEP 1

Coarse Rock Tumbler Grit
60/90 Mesh Silicon Carbide)

This is the grit that most people use in STEP 1 of the rock tumbling process. It is an ungraded 60/90 mesh silicion carbide powder. In a rotary tumbler we use about four tablespoons of coarse grit for every three pounds of barrel capacity.

One pound units are shipped in a resealable plastic tub. Five pound units are packaged in a durable zip-lock bag and shipped in a corrugated box.

Caution: Do not dispose of used grit, polish or rock slurry down a drain.

$5.95 Per Pound
Ships in a resealable tub.



$19.95 for 5 Pounds
Ships in a ziplock bag.


medium grit for rock tumblers
150/220 Grit - STEP 2

Medium Rock Tumbler Grit
(150/220 Silicon Carbide)

Use this grit that most people use for STEP 2 of the rock tumbling process. It is an ungraded 150/220 mesh silicon carbide powder. In a rotary tumbler we use about four tablespoons of medium grit for every three pounds of barrel capacity.

One pound units are shipped in a resealable plastic tub. Five pound units are packaged in a durable zip-lock bag and shipped in a corrugated box.

Caution: Do not dispose of used grit, polish or rock slurry down a drain.


$5.95 Per Pound
Ships in a resealable tub.



$19.95 for 5 Pounds
Ships in a ziplock bag.


Rock tumbler fine grit / pre-polish
500F Grit - STEP 3

Fine Rock Tumbler Grit
(500F Mesh Silicon Carbide)
Also known as pre-polish

STEP 3 of the rock tumbling process prepares your rocks for polishing. This silicon carbide pre-polish removes scratches made by coarse and medium grit. It is a 500F silicon carbide powder. In a rotary tumbler we use about four tablespoons of fine grit for every three pounds of barrel capacity.

One pound units are shipped in a resealable plastic tub. Five pound units are packaged in a durable zip-lock bag and shipped in a corrugated box.

Caution: Do not dispose of used grit, polish or rock slurry down a drain.

$9.95 Per Pound
Ships in a resealable tub.



$24.95 for 5 Pounds
Ships in a ziplock bag.

Rotary Grit Kits


Rock tumbler grit kit
Four Step Grit Kit
Save $44.80 !
Buying a large grit kit will save you $44.80 over the cost of buying five standard grit kits. Your shipping costs will also be lower. In our opinion, this is the best deal on our website!

Four-Step Rock Tumbler Grit Kits for Rotary Tumblers

Here are all of the grits and polish that you need to process rocks in a rotary tumbler. Includes coarse (60/90), medium (150/220) and fine (500F) silicon carbide grit and TXP aluminum oxide rock polish.

Standard Grit Kits have 1 pound of coarse, medium and fine grit plus 8 ounces of TXP polish. Packaged in resealable tubs. This is enough supplies to tumble up to four three-pound barrels of rocks.

Large Grit Kits contain 5 pounds of coarse, medium and fine grit plus 2.5 pounds of TXP polish. Packaged in ziplock bags within corrugated boxes.

Caution: Do not dispose of used grit, polish or rock slurry down a drain.

Large Grit Kit
Only $79.95 Each


Five pounds each of coarse, medium and fine grit plus 2.5 pounds of TXP polish.



Standard Grit Kit
Only $24.95 Each


One pound each of coarse, medium and fine grit plus .5 pounds of TXP polish.


Rock tumbler single use grit kit

Single Use Rock Tumbler Grit Kits for Rotary Tumblers
(with two coarse packets)

Here are all of the grits and polish that you need to process ONE barrel of rocks in a small rotary tumbler. Just cut the bag open and dump it in the barrel. The perfect amount of grit for barrels of the Lortone 3A and 33B tumblers and the Thumler's A-R1 and A-R2 tumblers.

Note: We include a second packet of coarse grit because running the rocks for a second week in coarse usually produces much nicer tumbled stones!

Caution: Do not dispose of used grit, polish or rock slurry down a drain.

$9.95 Per Kit

$8.95 if you buy 3 or more. (adjust quantity in cart)

Vibratory Grit Kits


Vibratory tumbler grit kit

THREE-Step Rock Tumbler Grit Kit for Vibratory Tumblers

This three-step grit kit is designed for use in the Lot-o-Tumbler and in the Thumler's Ultra Vibe vibratory rock tumblers.

Each kit contains two pounds of medium grit (150/220), one pound of fine grit (500F), and one-half pound of #61 Rapid Polish (a sub micron aluminum oxide polish). This is enough grit and polish to process many pounds of rocks.

Caution: Do not dispose of used grit, polish or rock slurry down a drain.

Only $24.95 Each