---
product_id: 412551126
title: "K1 Quiet Rock Tumbler Kit for Adults, Kids & Families | Reliable 2.5Lb Rotary Rock Polisher, Thick Rubber Barrel, 3 Speeds, 9-Day Timer, Memory Function, Complete Gem Polishing Kit"
brand: "komestone"
price: "$219.03"
currency: USD
in_stock: true
category: "Kome Stone"
url: https://www.desertcart.us/products/412551126-k1-quiet-rock-tumbler-kit-for-adults-kids-and-families
store_origin: US
region: United States of America
---

# 75% quieter rubber barrel 9-day programmable timer 2.5 lb capacity barrel K1 Quiet Rock Tumbler Kit for Adults, Kids & Families | Reliable 2.5Lb Rotary Rock Polisher, Thick Rubber Barrel, 3 Speeds, 9-Day Timer, Memory Function, Complete Gem Polishing Kit

**Brand:** komestone
**Price:** $219.03
**Availability:** ✅ In Stock

## Summary

> 💎 Polish Like a Pro, Quietly & Confidently

## Quick Answers

- **What is this?** K1 Quiet Rock Tumbler Kit for Adults, Kids & Families | Reliable 2.5Lb Rotary Rock Polisher, Thick Rubber Barrel, 3 Speeds, 9-Day Timer, Memory Function, Complete Gem Polishing Kit by komestone
- **How much does it cost?** $219.03 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/412551126-k1-quiet-rock-tumbler-kit-for-adults-kids-and-families)

## Best For

- komestone enthusiasts

## Why This Product

- Trusted komestone brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Whisper-Quiet Operation:** Enjoy up to 75% noise reduction for peaceful polishing anywhere—living room friendly.
- • **Maximize Your Batch Size:** 2.5 lb thick rubber barrel polishes 2.5× more stones per run than standard kits.
- • **All-Inclusive Starter Kit:** Comes with rough stones, polishing grits, ceramic media, jewelry findings, and full-color guide—start polishing day one.
- • **Built to Last & Supportive:** Replaceable parts and US-based support ensure your tumbler stays a lifelong hobby companion.
- • **Smart, Hassle-Free Controls:** 3 speeds, pause/resume, and memory function with a 9-day timer keep your workflow seamless.

## Overview

The KomeStone K1 Quiet Rock Tumbler Kit is a top-rated, 2.5 lb capacity rotary polisher featuring a thick rubber barrel that reduces noise by 75%. It offers smart digital controls with a 9-day timer and memory function, making it ideal for adults, kids, and hobbyists. The complete kit includes rough stones, polishing grits, ceramic media, and jewelry findings, supported by replaceable parts and US-based customer service for long-term use.

## Description

Buy KomeStone K1 Quiet Rock Tumbler Kit for Adults, Kids & Hobbyists | Reliable 2.5Lb Rotary Rock Polisher, Thick Rubber Barrel, 3 Speeds, 9-Day Timer, Memory Function, Complete Gem Polishing Kit: Tumbling Media - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

## Features

- 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 desertcart's return window? Our US-based customer service team offers 24/7 hassle-free replacement or refund support — we've got you covered.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09PYR2RRT |
| Age Range Description | 13 years and up |
| Best Sellers Rank | #7,821 in Toys & Games ( See Top 100 in Toys & Games ) #3 in Kids' Rock Tumblers |
| Brand Name | KomeStone |
| Color | Black |
| Customer Reviews | 4.3 4.3 out of 5 stars (3,823) |
| Educational Objective | Teaching geology, creative design, patience |
| Included Components | 1 pound of rocks & 4 bages of polishing grits & ceramic pellets, 1 rock tumbler base & 1 rubber barrel, 2 PU belts & user instructions, jewelry fastenings & adaptor & screwdriver & mesh strainer |
| Indoor Outdoor Usage | Indoor |
| Item Dimensions | 11.22 x 9.02 x 5.71 inches |
| Manufacturer | KomeStone |
| Manufacturer Maximum Age (MONTHS) | 1200 |
| Manufacturer Minimum Age (MONTHS) | 156 |
| Manufacturer Part Number | CA-KS0107RT17 |
| Material Type | Japanese carbon motor, Top quality of stainless steel, Tyre grade rubber, 𝐂𝐏𝐒𝐈𝐀 & 𝐂𝐏𝐂 𝐂𝐞𝐫𝐭𝐢𝐟𝐢𝐞𝐝 |
| Model Number | K1 |
| Number of Players | 1 |
| Operation Mode | Manual |
| Power Source | AC adapter |
| Set Name | KomeStone K1 Professional Large 2.5LB Capacity Edition |
| Size | Large |
| Supported Battery Types | No batteries required |
| Theme | Lapidary Tool for DIY Jewelry & Crafts, Perfect gift choice for the families or friends, Rock Tumbler Kit for Polishing Stones, Rock Tumbler Starter Kit with Timer & Motor, Rock Tumbler with Grits and Accessories, Stone Polishing Machine for Kids & Adults |
| Unit Count | 1 Count |

## Images

![K1 Quiet Rock Tumbler Kit for Adults, Kids & Families | Reliable 2.5Lb Rotary Rock Polisher, Thick Rubber Barrel, 3 Speeds, 9-Day Timer, Memory Function, Complete Gem Polishing Kit - Image 1](https://m.media-amazon.com/images/I/91qI8mtCfjL.jpg)

## Available Options

This product comes in different **Color** options.

## Questions & Answers

**Q: Replacement belts. How do I order?**
A: Hi, here is the link for the belts: 
https://www.amazon.com/dp/B09S67HKV5/

Or just search KomeStone rock tumbler belts at amazon.com, then you'll find the belts. 

You are also welcome to follow our brand store on amazon.com through this link: https://www.amazon.com/stores/RockTumblerKit/page/98CD222F-C7A7-4372-80AE-0F0370A463C5
you'll find all accessaries related to our rock tumbelrs. 
If you want to contact our customer service, just email us via: support@komestone.com, we'll get back to you very soon!

**Q: Will the starter kit include all 9 kinds of stones or are there just some random rocks?**
A: This rock tumbler kit includs 9 kinds of stones as advertised,  weights around 1lb.

**Q: Can I tumble rocks we find at the park or do they have to be these special rocks?**
A: You can tumble any rocks you’d like, I suggest you get a rock identification app, plus a hardness chart. The rocks you tumble need to be the same hardness or the softer rocks will disappear… this is a lot of fun and the outcome is beautiful

**Q: Can this tumbler be used to polish metal washers?**
A: Based on two factors, yes it can.
#1 The washer must be a metal that could be polished in a conventional method, such as a buffing machine.
#2 That you are using a powder made for polishing.
I will add that I do not recommend polishing metal items in a tumbler,

## Frequently Bought Together

- Rock Tumbler Kit, K1 Professional Large 2.5LB Capacity Edition - Memory Function, Digital Timer & Variable Speeds: Create Stunning Gems Full Accessories Included
- Rock Tumbler Polishing Grits and Ceramic Tumbling Media Kit | Essential for Polishing, 4 Steps Rock Tumbling Refill Media, Polish up to 25 lbs of Rocks, Work with Any Rock Tumblers, for More Tumbles

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-08-09*