KomeStone 17000-Grit Aluminum Oxide Rock Tumbler Polish

KomeStone 17000-Grit Aluminum Oxide Rock Tumbler Polish is a fine finishing powder for the final stage of tumbling prepared rocks, gems, or glass. Its stated 1 lb refill format suits measured batches, but it is intended for surface finishing after shaping and earlier polishing are complete.

At a glance

Designed for a final finishing cycle after grinding, smoothing, and regular polishing, or as an additional cycle after 8000 grit.
The listing describes use with prepared quartz, agate, other gemstones, and glass.
Works with rotary and vibratory tumblers, with directions to measure powder for each batch and follow the machine's loading instructions.
The listing suggests beginning with clean stones and a clean barrel, checking progress periodically, and rinsing stones thoroughly after polishing.

Price

$28.48Save 23%

Reference price: ~~$36.98~~

Price checked: Nov 14, 2026

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Pros and cons

Pros

The high nominal grit grade offers a dedicated finishing option after lower-grit preparation.
Suitable for several stated materials and both rotary and vibratory tumblers.
The listed usage ratio and initial time guide provide a practical starting point for batch planning.

Cons

This is a finishing powder, not a complete grit sequence, so stones need shaping and earlier polishing before use.

Technical specifications

9 specifications

Identity
Brand	KomeStone

Dimensions and weight
Package dimensions	5.24 x 3.35 x 3.23 inches
Weight listed	1.08 pounds

Polishing compound
Nominal grit	17000 grit
Abrasive	Aluminum oxide
Role	Step 5 final polish

Use
Compatible tumbler types	Rotary and vibratory
Suggested powder quantity	approximately 0.05 lb of powder per 1 lb of stones
Initial run-time guide	3–5 days

What to know before buying

Listing details to confirm

The 17000-grit grade is compared in the listing with regular polish at 800–1500 grit. The stated final appearance and 3–5 day starting guide depend on material hardness, preparation, load conditions, equipment, and polishing time. The separate system description calls 8000 grit Step 5 and 12000 grit Step 5/6 while presenting this 17000-grit product as the ultimate final step, so the step numbering across the range is inconsistent. The listing also calls this a resealable 1 LB refill, while its weight field says 1.08 pounds.

Who is it for?

A good fit for

Tumbling hobbyists who already have prepared stones and want a separate fine finishing stage.
Users polishing quartz, agate, gemstones, or glass in a rotary or vibratory tumbler.

Less suited to

Buyers seeking a complete multistage grit kit or a compound for initial shaping and smoothing.
Users who need a guaranteed finish time or result across different stones and tumbler loads.

KomeStone 17000-Grit Aluminum Oxide Rock Tumbler Polish · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.8 / 5 · 17 ratings

5 stars80%80%
4 stars20%20%
3 stars0%0%
2 stars0%0%
1 star0%0%

Aggregate ratings lean positive, with five- and four-star categories represented and no lower-star categories shown. The sample is small and contains no written feedback here, so it cannot establish why buyers rated it positively or how consistently it performs. For buyers considering a specialist finishing powder, the ratings offer only a limited satisfaction signal, not confirmation of the listed grit, compatibility, or finish claims.

Frequently asked questions

When should this polish be used?

The listing positions it for final finishing after grinding, smoothing, and regular polishing, or for an additional cycle after 8000 grit.

Can it be used in rotary and vibratory tumblers?

Yes. The listing says it is compatible with both types and advises following the equipment's loading instructions.

How much powder and how long should a cycle take?

The suggested starting amount is approximately 0.05 lb per 1 lb of stones, with 3–5 days as an initial guide. Check progress and adjust for the material and equipment.

Does this include the earlier-stage grits?

The supplied product information describes this as a 1 lb final-polish refill, not a complete grit kit.