Refill Grit Kit | 3 LB Barrel Rock Tumbling Grit

Our Rock Tumbling Grit Refill-Kit provides pre-measured material to complete a polishing cycle for your own 3 LB rotary tumbler. 

The kit includes:
• Stage 1: Coarse (80 Grit) Silicon Carbide x2
• Stage 2: Medium (220 Grit) Silicon Carbide
• Stage 3: Fine (600 Grit) of Silicon Carbide
• Stage 4: Polish (Aluminum Oxide at 1 - 3 micron size)
• Stage 5: Burnish (Borax)

• 8 oz of Ceramic Media

Optional Bundle:
• We include options for you to add 2 LBs of hand-selected rough rocks to pair with our grit for your rock tumbling journey. A combination of in-house tumbled stones are shown as an example (Bahia Agates, Carnelian, Crazy Lace and Sea Jasper).

More about rock tumbling:
The process of rock tumbling consists of four stages of finer and finer abrasive grit that slowly smooths down natural imperfections in the rocks until the surface exhibits a rounded, clean finish. The fifth stage is all about bringing out that mirror-like luster!

We recommend using stones between 5 and 7 on the Mohs Hardness Scale. Examples include:

- Agate
- Jasper
- Quartz (e.g. amethyst)
- Chalcedony
- Apatite
- Obsidian

Note: Each stage is packed and measured by hand in individual bags for each stage.

Tumbling Stage 1: Silicon Carbide (Grit 80)
• The coarsest grit used in the first stage of the tumbling process rounds and shapes your rocks.

Tumbling Stage 2: Silicon Carbide (Grit 220)
• 220 Silicon Carbide is a finer grit that is used to remove the scratches left by the coarser 80 Silicon Carbide (from Stage 1).

Tumbling Stage 3: Silicon Carbide (Grit 600)
• 600 Silicon Carbide is an even finer abrasive than the 220 Silicon Carbide that is used to remove the microscopic scratches left from the prior stage.

Tumbling Stage 4: Micro Aluminum Oxide (1-3 micron size)
• Our Micro Aluminum Oxide Polish is used in the Tumbling Stage 4 to finally impart the mirror like shine upon your rocks.

Tumbling Stage 5: Burnishing (Cleaning)
• We recommend a "half day" cleaning cycle (about 7 hours) using Borax. This helps remove any leftover "film" from the Polishing Powder from Stage 4.