Home / Toys & Games / KomeStone K5 Rock Tumbler Kit for Kids & Beginners, Quiet Rock Polisher | Up to 85% Quieter , Noise-Reducing Cover, CPC-Certified, Ages 6+, 3 Speeds, 9-Day Timer, Memory, Complete Kit with Gemstones

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KomeStone K5 Rock Tumbler Kit for Kids & Beginners, Quiet Rock Polisher | Up to 85% Quieter , Noise-Reducing Cover, CPC-Certified, Ages 6+, 3 Speeds, 9-Day Timer, Memory, Complete Kit with Gemstones

-10% $ 42 .99 $47.99

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100+ sold last month

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Description

Designed for Kids, Beginners & First-Time Users — More than a basic plug-in-and-run tumbler, this starter rock tumbler for kids combines a patented exterior design with guided instructions, simple digital controls, and an easy-to-use setup. Young explorers, adult beginners, and families can confidently follow each polishing stage and transform rough stones into smooth, polished keepsakes.

Up to 85% Quieter with Dual Noise Reduction & CPC-Documented Child Safety — The K5 noise-reducing rock tumbler combines a thick rubber barrel with a clear noise-reducing cover to help reduce operating noise by up to 85% versus standard plastic-barrel tumblers under comparable conditions. Ideal for homes, bedrooms, classrooms, and apartments, the enclosed cover helps prevent accidental contact with rotating parts. Its Children’s Product Certificate documents compliance with applicable U.S. children’s product safety requirements for added parental confidence.

Durable Rubber Barrel for Quieter, Gentler Tumbling — This rock polisher for kids and beginners uses a thick rubber barrel to cushion rock impact, soften harsh clattering sounds, and help protect stone surfaces throughout every polishing stage. Its durable construction supports repeated tumbling projects and provides a smoother polishing experience for agate, jasper, quartz, sea glass, gemstones, and many other popular tumbling materials.

More Control Than Basic Starter Tumblers — 3 Speeds, 9-Day Timer & Memory — Unlike plug-in-and-run or one-touch models, this beginner rock tumbler offers greater control over each polishing stage. Select from three speeds and set the adjustable timer for up to nine days. Pause to inspect the stones, then resume without reprogramming. Automatic shutoff stops the cycle when time is complete, while the memory function restores previous settings after a power interruption. The clear digital display makes progress easy to monitor.

Complete Rock Tumbler Kit with Gemstones for Your First Polishing Batch — This all-in-one stone polishing kit includes a rock tumbler base, durable rubber barrel, 0.5 lb of assorted rough gemstones from around the world, four labeled bags of 4-stage rock polishing grit, mesh sifter, jewelry findings, three replacement belts, and a full-color illustrated learning guide. Each stage is clearly explained to help beginners progress from rough stones to smooth, polished keepsakes. No separate grit or rough stones are needed to begin the first complete polishing batch.

Hands-On STEM Learning That Turns Curiosity into Creativity — This rock polishing kit for kids creates an engaging hands-on experience where young explorers and adult beginners can observe how rough stones gradually change through multiple polishing stages. The process encourages patience, observation, creativity, problem-solving, and an interest in rocks and geology while producing real polished keepsakes that can be collected, shared, or turned into jewelry projects. It also makes an engaging educational gift for birthdays, holidays, and family activities.

Built for Future Tumbling Projects with Replaceable Parts — This starter tumbling kit is designed to support more than the first polishing batch. Three replacement drive belts are included in the box for routine maintenance. If additional support is needed, KomeStone can provide eligible brand-new replacement items, including a tumbler base, rubber barrel, additional drive belts. Replacing individual components helps extend the life of the tumbler and keeps future rock collections, polishing batches, and jewelry projects moving forward.

90-Day Money-Back Guarantee & 1 Year Warranty — Risk Free Purchase — Shop with complete confidence. This rock tumbler kit 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.

We may earn commissions on qualifying purchases.

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$110 .93 $158.47

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Amazon

C1 Pro Ultra Brushless Rock Tumbler Kit - Double Barrel for Extra Large 7LB Capacity, with 4 Pounds Rock Tumbler Grit Kit

-26%

$171 .35 $232.97

Amazon

C1 Pro Ultra Brushless Rock Tumbler Kit - Double Barrel for Extra Large 7LB Capacity, with 10 Pounds Rock Tumbler Grit Kit

-25%

$182 .22 $242.97

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C1 Rock Tumbler, Large 2.5LB Capacity with 4LB Rock Tumbler Grit and Polish Refill Media Kit

-23%

$79 .75 $102.96

Amazon

Large 2.5LB Professional Rock Tumbler Kit, Rubber Barrel, Quiet Rotary Stone Polisher with 6 Belts, Rough Gemstones, 4 Polishing Grits with 10 Pounds Rock Tumbler Grit Kit

-20%

$90 .36 $112.96

Amazon

A1 Pro Brushless Rock Tumbler Kit - Double Barrel for Large 8LB Capacity, Adjustable Speed & Timer, Durable Metal Base for Adults & Rock Collectors – Includes Full Accessories

-15%

$169 .99 $199.99

100+ sold last month

Amazon

-13%

$12 .99 $14.95

Amazon

Rock Tumbler Double Drum 6LB Lapidary Polisher

-10%

$89 .99 $99.99

Amazon

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-8%

$125 .47 $136.46

Amazon

C5 Starter Rock Tumbler Kit - Durable Leak-Proof Rock Polisher - Complete Rock Tumbling Kit with 4 Pounds Rock Tumbler Grit Kit

-7%

$66 .53 $71.47

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Macy’s

Mindblown Motorized Rock Tumbler Set, Ages 8+

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$19 .99 $39.99

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Gamerside Gem Stones 150+ Rocks Kit, STEM Kit with Bingo Game for Kids 6+ | Gemstones Rock and Crystals With Board Game, Interactive Family Game Night Activity, STEM Gift for Young Geologists

-5%

$18 .99 $19.99

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Amazon

Birdfy Smart Bird House with Camera Solar Powered, Birdhouses for Outdoors | Lifetime Bird ID Free,1080 HD Live Video & Night Vision, Auto Detect & Notify, Gift for Bird Lovers

-35%

$109 .99 $169.99

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-29%

$9 .99 $13.99

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$17 .99 $23.99

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48 Sheets Scrapbook Paper 12x12 Patterned Papers Pack (Floral) | Double Sided, Spring Floral Decorative Craft Paper, for Scrapbooking Junk Journals Greeting Cards Decoration

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$8 .99 $17.99

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GIGALUMI 11.5" Solar Garden Statues Turtle Figurine Lights for Outside | Large Tortoise Statue for Lawn, Patio, Balcony Garden Decor Yard Decorations Outdoor, Birthday Gifts for Mom, Women

-17%

$29 .99 $35.99

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-19%

$13 .68 $16.98

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