Price: ~~$69.98~~ - $59.98
(as of Aug 01, 2026 22:00:29 UTC – Details)

Product description

Reliable Serious Hobby Rock Tumbler For Starters And Hobbyists

1 Tumble With Confidence

2 Smart Memory Function

3 Stop and Start Anytime

4 Leak-Resistant Design

5 Little Detail Matters

1 Complete Rock Tumbler Kit

2 Built To Stay In Service

1 Trusted By Enthusiasts

2 Recognized By Medias

3 Loved By Collectors

1 Real Results

2 Beginner Friendly

Reliable Hobby Rock Tumbler Supplies

Add to Cart

Customer Reviews

4.6 out of 5 stars 297

4.3 out of 5 stars 3,822

4.4 out of 5 stars 586

4.6 out of 5 stars 252

4.6 out of 5 stars 257

Price

$28.48$28.48

$59.98$59.98

$72.15$72.15

$129.98$129.98

$111.99$111.99

$309.99$309.99

Model

Tumbling Grit Kit – 4 Lbs

KomeStone K1

KomeStone K1 Pro

KomeStone K2

KomeStone G1

KomeStone G3

Highlight

Complete Tumbling Grit Kit

Quiet Hobby

Advanced Hobby

Noise-Reduction Design

Heavy-Duty Metal

Large-Capacity System

Motor

Brushed Motor

Brushless Motor

Settings

3 Speed / 9-Day Timer

99-Day Display Timer

Applications

Rocks, Coins, Sea Glasss, Etc.

Target Groups

Kids & Adults

Adults

Replacements Avalaible?

Yes

Warrn*ty

1-Year Free Replacement

5-Year Free Replacement

Trusted by 3,000,000+ Hobbyists — Ranked #1 by Independent Review Publications — Named the top rock tumbler by NBC’s Today, BestReviews, BuyerGuide, and more (2022–2026) — recognized for performance, reliability, and value. With over 3,000,000 orders shipped across KomeStone’s lineup as of July 2026, it’s the trusted choice for adults, hobbyists, and families who want a dependable tumbler that delivers real results.
Designed for Adults, Kids, Teens, and Families — Built for anyone who wants a quiet, reliable tumbler for everyday home use. The 2.5 lb capacity makes it the ideal first step up from a standard 1 lb beginner kit — and with dedicated US-based support and replaceable components, the K1 is a machine adults and hobbyists trust, kids and teens can start on, and beginners can genuinely learn from.
75% Quieter Rubber Barrel with 2.5 lb Capacity — Process agates, jasper, quartz, gemstones, sea glass, and most popular tumbling stones. The 2.5 lb barrel gives you 2.5× the capacity of a standard 1 lb barrel, letting you polish more stones per batch. Its thick rubber construction cushions rock impact and reduces noise by up to 75% compared to plastic barrels — comparable to a running dishwasher — for a comfortable tumbling experience in living rooms, garages, workshops, and hobby spaces.
Smart Controls with Pause, Resume and Settings Memory — Choose from 3 speed settings and program each polishing stage on the clear LCD screen with the adjustable 9-day digital timer. Pause the tumbler to check your stones, then resume without restarting your settings. Automatic shutoff stops the cycle when complete, while the memory function restores your settings after any power interruption — the perfect, hassle-free control system for beginners and hobbyists alike. Set your stage, walk away, and come back to perfectly tumbled stones.
Complete Rock Tumbler Kit — Ready to Unbox and Start on Day One — Includes the K1 tumbler, a thick 2.5 lb rubber barrel, 1 lb of rough rocks in 9 varieties sourced from around the world, four bags of 60/120/150/1200 polishing grit, ceramic tumbling media, a mesh strainer, jewelry findings, 3 drive belts, and a full-color illustrated guide. No additional purchases needed — everything required to begin your first polishing batch is already in the box.
Step-by-Step Guidance for Every Level — The included full-color guidebook covers everything from initial setup to finishing your first batch — with detailed polishing techniques, troubleshooting steps, and practical tips like adding soapy water during polishing stages. Our US-based support team is also available anytime for polishing questions or machine help. Together, the comprehensive guidance and dedicated support help adults, beginners, teens, and families make real progress — from rough stones to finished keepsakes. Makes a complete geology or STEM gift for rock enthusiasts of all ages.
Replaceable Key Parts for Long-Term Ownership — Core components are designed to be individually replaceable, not discarded. The motor, control panel, drive belt, rubber barrel, and metal lid kit are each available as replacement parts directly from KomeStone, with no planned end to parts supply. The K1 isn’t a one-season purchase — it’s a permanent part of your hobby setup.
𝟗𝟎-𝐃𝐚𝐲 𝐌𝐨𝐧𝐞𝐲-𝐁𝐚𝐜𝐤 𝐆𝐮𝐚𝐫𝐚𝐧𝐭𝐞𝐞 & 𝟏-𝐘𝐞𝐚𝐫 𝐖𝐚𝐫𝐫𝐚𝐧𝐭𝐲 — 𝐑𝐢𝐬𝐤-𝐅𝐫𝐞𝐞 𝐏𝐮𝐫𝐜𝐡𝐚𝐬𝐞 — Shop with complete confidence. Your K1 is backed by a 90-day satisfaction guarantee and a 1-year warranty. Miss Amazon’s return window? Our US-based customer service team offers 24/7 hassle-free replacement or refund support — we’ve got you covered.