---
product_id: 413531948
title: "Rock Tumbler Kit, K1 Professional Large 2.5LB Capacity Edition - Memory Function, Digital Timer & Variable Speeds: Create Stunning Gems Full Accessories Included"
brand: "komestone"
price: "¥44054"
currency: JPY
in_stock: true
url: https://www.desertcart.jp/products/413531948-rock-tumbler-kit-k1-professional-large-2-5lb-capacity-edition
store_origin: JP
region: Japan
---

# 2.5LB large capacity drum 9-day digital timer 3 variable speed settings Rock Tumbler Kit, K1 Professional Large 2.5LB Capacity Edition - Memory Function, Digital Timer & Variable Speeds: Create Stunning Gems Full Accessories Included

**Brand:** komestone
**Price:** ¥44054
**Availability:** ✅ In Stock

## Summary

> 💎 Turn rough into remarkable—your personal gem studio awaits!

## Quick Answers

- **What is this?** Rock Tumbler Kit, K1 Professional Large 2.5LB Capacity Edition - Memory Function, Digital Timer & Variable Speeds: Create Stunning Gems Full Accessories Included by komestone
- **How much does it cost?** ¥44054 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/413531948-rock-tumbler-kit-k1-professional-large-2-5lb-capacity-edition)

## 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

- • **All-Inclusive Kit:** Comes fully equipped with everything you need to start transforming rough rocks into stunning gems immediately.
- • **Memory Function Magic:** Pause and resume your polishing cycle without losing progress—because your masterpiece deserves patience.
- • **Educational & Creative:** Ideal for managers and makers who value mindfulness, geology lessons, and unique jewelry design inspiration.
- • **Generous 2.5LB Capacity:** Tumble more stones in one go—perfect for serious hobbyists and creative pros alike.
- • **Precision Polishing Control:** Customize your gem crafting with 3 variable speeds and a 9-day digital timer for flawless results every time.

## Overview

The K1 Professional Rock Tumbler Kit features a large 2.5LB stainless steel drum, a digital LCD timer with up to 9-day settings, and 3 adjustable speeds with pause/resume memory function. Designed for ages 8+, it’s perfect for creating polished gemstones with precision and ease, making it a must-have for creative professionals and hobbyists seeking a mindful, hands-on crafting experience.

## Description

Rock Tumbler Kit, K1 Professional Large 2.5LB Capacity Edition - Memory Function, Digital Timer & Variable Speeds: Create Stunning Gems Full Accessories Included

## Features

- ⚡ ⚡ ⚡ _xD835__xDC0E__xD835__xDC2B__xD835__xDC22__xD835__xDC20__xD835__xDC22__xD835__xDC1A__xD835__xDC27__xD835__xDC1A__xD835__xDC25_ _xD835__xDC0C__xD835__xDC1A__xD835__xDC27__xD835__xDC2E__xD835__xDC1F__xD835__xDC1A__xD835__xDC1C__xD835__xDC2D__xD835__xDC2E__xD835__xDC2B__xD835__xDC1E_ & _xD835__xDC01__xD835__xDC2B__xD835__xDC1A__xD835__xDC27__xD835__xDC1D_ _xD835__xDC0E__xD835__xDC2E__xD835__xDC2D__xD835__xDC25__xD835__xDC1E__xD835__xDC2D_: KomeStone brand owns the design of this rock tumbler
- Belts are consumable, Please _xD835__xDC2B__xD835__xDC1E__xD835__xDC1A__xD835__xDC1C__xD835__xDC21_ _xD835__xDC28__xD835__xDC2E__xD835__xDC2D_ _xD835__xDC2D__xD835__xDC28_ _xD835__xDC2E__xD835__xDC2C_ _xD835__xDC1F__xD835__xDC28__xD835__xDC2B_ _xD835__xDFD3_ _xD835__xDC1E__xD835__xDC31__xD835__xDC2D__xD835__xDC2B__xD835__xDC1A__xD835__xDC2C_ _xD835__xDC1F__xD835__xDC28__xD835__xDC2B_ _xD835__xDC2C__xD835__xDC29__xD835__xDC1A__xD835__xDC2B__xD835__xDC1E_ _xD835__xDC2E__xD835__xDC2C__xD835__xDC1E_
- 90-Day Refund guarantee & _xD835__xDFD0_-_xD835__xDC18__xD835__xDC1E__xD835__xDC1A__xD835__xDC2B_ _xD835__xDC16__xD835__xDC1A__xD835__xDC2B__xD835__xDC2B__xD835__xDC1A__xD835__xDC27__xD835__xDC2D__xD835__xDC32_: _xD835__xDC08__xD835__xDC1F_ _xD835__xDC32__xD835__xDC28__xD835__xDC2E_'_xD835__xDC2F__xD835__xDC1E_ _xD835__xDC26__xD835__xDC22__xD835__xDC2C__xD835__xDC2C__xD835__xDC1E__xD835__xDC1D_ _xD835__xDC00__xD835__xDC26__xD835__xDC1A__xD835__xDC33__xD835__xDC28__xD835__xDC27_'_xD835__xDC2C_ _x
- DIVE INTO THE FUN ROCK TUMBLING: KomeStone rock tumbler is for turning rough raw rocks into smooth gemstones, you will be very excited to see the rocks changes with each cycle. That will be a good lesson on patience and geology for kids or a good idea for mom's jewelry making.
- 2023 NEW UPGRADE & ADVANCED FEATURES: Built with LCD screen, 9-day setting timer display, 3 speed controls, and pause & resume function. These allow you to have different polishing recipes and steps. That means you can try to make the stone polish brighter, that's more fun..2.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Product Dimensions | 28.5 x 22.91 x 14.5 cm; 2.82 kg |
| Manufacturer recommended age | 8 years and up |
| Item model number | K1 |
| Educational Objective(s) | Teaching geology, patience, and creative design |
| Number of Game Players | No Limit |
| Assembly Required | No |
| Batteries Required? | No |
| Batteries Included? | No |
| tech_spec_battery_description_toys | No batteries required |
| Material Type(s) | metal, metal Tyre grade rubber Please reach out via our customer service email support@komestone.com help any issues or if you have missed Amazon s 30-day return window Top quality of stainless steel |
| Material Care Instructions | Hand Wash |
| Remote Control Included? | No |
| Color | Brush Motor: K1 |
| ASIN | B09PYR2RRT |

## Images

![Rock Tumbler Kit, K1 Professional Large 2.5LB Capacity Edition - Memory Function, Digital Timer & Variable Speeds: Create Stunning Gems Full Accessories Included - Image 1](https://m.media-amazon.com/images/I/81iUyAHFOIL.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 Japan*
*Store origin: JP*
*Last updated: 2026-02-01*