How can I order more polishing grits?

We have a polishing grits kit of 4 lbs, just visit the link: https://www.amazon.com/dp/B0B74KYP44. For any questions and concerns, please contact our customer service via: support@komestone.com, we'll get back to you very soon. For any issues about this rock tumbler, we promise to solve timely. We are standing behind our brand and products. Thanks for purchasing from us.

How much polishing grits should I use?

For better results, we would advise you to add 2 tbsp or more of polishing grits per pound of rocks, and 0.5 lb-1 lb of the ceramic pellets for protect rocks from scratches.

What is the rotation speeds per minute?

Normally speaking, the speeds is quite steady. Speed 1：770 Speed 2：920 Speed 3：1080

Can I add more than 3 lbs rocks into this barrel for tumbling?

The capacity of the barrel for the K2 Elite rock tumbler is 3 lbs, so you can add as much as 3 lbs of rocks, and then add water, and polishing grits and ceramic pellets. For any questions and concerns, please contact our customer service via: support@komestone.com, we'll get back to you very soon. For any issues about this rock tumbler, we promise to solve timely. We are standing behind our brand and products. Thanks for purchasing from us. Anne.

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💎 Transform Rough Rocks into Radiant Gems—Silently and Effortlessly!

WHISPER QUIET POWER - State-of-the-art brushless motor ensures noise levels as low as a dishwasher, perfect for shared or indoor spaces.
MUSEUM QUALITY SHINE - Scientifically engineered 4-stage grit system with precision ceramic media delivers professional-grade, flawless polish every time.
KID FRIENDLY STEM FUN - Comes with full-color, easy-to-follow instructions—ideal for inspiring patience and creativity in young rock collectors and future jewelers.
MASSIVE 3 POUND BARREL - Polish large batches of stones at once, accelerating your gem crafting and maximizing your creative output.
LIFETIME SUPPORT EXTRAS - Includes spare belts, polishing grit, and lifetime accessory replacement with direct manufacturer support—never get stuck mid-project.

The KomeStone K2 Elite Rock Tumbler Kit features a cutting-edge brushless motor for ultra-quiet operation, a super-large 3-pound soft rubber barrel for high-capacity tumbling, and a scientifically designed 4-stage polishing system that produces museum-quality gemstone finishes. Perfect for adults and kids alike, it includes all necessary accessories, detailed instructions, and lifetime support, making it the ultimate tool for professional-quality rock polishing and STEM learning.

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Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Model Number	CA-KS0515RT46
Batteries Required?	No
Batteries Included	No
Material Type(s)	State-of-the-art brushless motor Tire Grade Rubber Top Quality Stainless Steel Please email to our after-sales service center ([email protected]) to receive an extra bag of rock after placing your order. Our customer service will solve your problem timely
Target Gender	Unisex
Item model number	CA-KS0515RT46
Product Dimensions	17.27 x 20.07 x 20.07 cm; 3.9 kg
ASIN	B0C58TH7W6

KomeStone K2 Elite Professional Rock Tumbler Kit, Ultra Quiet & Cutting Edge Brushless Motor Rock Polisher for Adults & Rock Collector, Noise-Reduction, Extra Large 3 Lbs Barrel, STEM Gift for All Age

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