🪨 Transform your stones into museum-worthy gems—don’t just polish, perfect!
The National Geographic Rock Tumbler Grit and Polish Refill Kit offers a complete 4-stage silicon carbide grit system designed to polish up to 20 lbs of rocks, gems, and glass. Compatible with all rock tumblers, it features easy-to-use, securely packaged grit containers and is developed by Blue Marble, an award-winning educational brand.
| Item Weight | 1.78 Kilograms |
| Item Dimensions | 5.5 x 5.5 x 4.25 inches |
| Size | Medium |
| Material Type | Carbide, Abrasive, Grit, Silicone |
| Color | Black |
| Theme | Science |
| Operation Mode | Manual |
| Educational Objective | Learn About Rock Tumbling |
| Number of Players | 1 |
S**6
Very convenient
Everything is included except the rocks, tumbling compound an water. Good clear instruction. You may want to experiment with the length of tumbling with each grit you use based on the subject you are polishing. Good, clear instructions.
G**E
Good product
Works great
R**I
Does the job
Decent quality and price. Good selection of grits
R**K
A good product
On time and as described, it works well!
M**D
EZ directions. EZ to store.
Easy to use. Directions are clear. Tumbling my first batch of rocks. I like that the grit is in plastic jars and easy to store.
P**A
Grit
Tumbler grit is great. Each step takes the rocks to a nice finish.
B**W
Good product
Good grit to start off rock tumbling. Only con is that there is one scooper so you would need to buy extra scoopers
R**R
rock tumbler
A very good item to use for tumbling rocks.
Trustpilot
1 week ago
1 month ago
