Rock Tumbler Grit Kit [6 Pounds] - Polish Up to 40 lbs. of Rocks

In this review the Rock Tumbler Grit Kit [6 Pounds] is evaluated for hobbyists and small-scale lapidarists who want an economical, complete polishing sequence. The bottom line: this kit supplies a full four-step set of grits in convenient jars and will cover up to 40 lbs of rocks, making it a strong value for repeated batches. The reviewer found it well packaged, easy to dose with the included scoop, and compatible with any tumbler, which means users can get consistent results without hunting for individual abrasives.

Key Features

• Complete four-step sequence: Includes Step 1 60 coarse silicon carbide, Step 2 150 medium silicon carbide, Step 3 600 pre-polish, and Step 4 1200 aluminum oxide for a full polishing workflow.
• Adequate quantity: The 6 lb total kit is formulated to polish up to 40 lbs of rocks, so you get enough media for multiple projects.
• Universal compatibility: The grit works with any tumbler, allowing both hobbyists and professional lapidarists to use familiar equipment without modification.
• Practical packaging: Hard plastic jars with secure lids prevent leaks and the included scoop enables precise dosing with minimal mess.
• Durable materials: High-quality silicon carbide and aluminum oxide grits deliver consistent abrasion and reliable polishing across batches.

Who It's For

The kit is best for hobbyists, craft enthusiasts, and entry-level lapidarists who routinely tumble stones at home and want a single, dependable source of all four grits. It is also appropriate for small workshop use where several batches are run over time and convenience of pre-measured jars matters.

Those who should look elsewhere include users who need industrial-scale quantities or who require specialized grit grades beyond the four included steps. If granular custom formulations or very large single-batch polishing are required, a bulk supplier or pro-grade abrasive options may be a better fit.

Pros & Cons

Pros

• Complete set of four grits covers the full coarse-to-finish polishing process for consistent results.
• Packaging and scoop make dosing straightforward and reduce mess during transfers.
• Good value because the kit polishes up to 40 lbs of rocks, stretching the material across multiple runs.

Cons

• Jars are the same physical size but contain different weights, so visual fullness varies and may be misleading when estimating amounts.

Specifications

Brand	KoolStone
Kit weight	6 lb total
Step 1	60 coarse silicon carbide, 2 lb
Step 2	150 medium silicon carbide, 2 lb
Step 3	600 pre-polish, 1 lb
Step 4	1200 aluminum oxide final polish, 1 lb
Coverage	Polish up to 40 lb of rocks

Our Verdict

For home tumblers and small workshops the kit represents a practical, cost-effective choice because it supplies a full, proven four-step polishing sequence in convenient jars and includes a dosing scoop for neat transfers. It is good value for anyone polishing multiple batches, though users who need bulk industrial amounts or nonstandard grits should consider specialized suppliers.

Frequently Asked Questions

How much rock can this kit polish?
Answer. The kit is sized to polish up to 40 lb of rocks when used across the four-step process.

Is it compatible with my tumbler?
Answer. Yes, the grits are compatible with any rotary tumbler and are suitable for both hobby and small professional use.

Does the kit come with tools for measuring?
Answer. Yes, hard plastic jars with secure lids and a convenient scoop are included for precise dosing and no-mess handling.