Home / Rock Tumbler Grit and Ceramic Tumbling Media 4 Pounds, Polish Up to 25 lbs. of Rocks, 4-Step Polish Refill Media Kit, Compatible with All Rock Tumblers, Essential Polishing Kit for Adults

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Rock Tumbler Grit and Ceramic Tumbling Media 4 Pounds, Polish Up to 25 lbs. of Rocks, 4-Step Polish Refill Media Kit, Compatible with All Rock Tumblers, Essential Polishing Kit for Adults

-14% $ 28 .48 $32.98

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300+ sold last month

Description

KoolStone Rock Tumblers for Every Level: Choose from our versatile lineup: the C1 and C1 Pro (2.5 lb capacity; Pro features a brushless motor for quieter, more efficient operation), the C1 Pro Max (3 lb capacity with noise-reducing cover), and the C1 Pro Ultra (dual barrel, 7 lb capacity, brushless motor, and noise-reducing cover). Each tumbler is designed to deliver consistent, high-quality results for both beginners and experienced rock collectors.

All-in-One Tumbling Solution: This complete 4 lb grit kit includes everything needed for a full 4-step rock tumbling process. Each set contains 1 lb of Step 1 (60-grit coarse silicon carbide), 1 lb of Step 2 (150-grit medium silicon carbide), ½ lb of Step 3 (600-grit fine silicon carbide), ½ lb of Step 4 (1200-grit aluminum oxide polish), and 1 lb of ceramic tumbling media for optimal barrel balance and smooth tumbling action.

Professional-Grade Results for Every Level: Designed to deliver consistent, high-quality finishes from rough shaping to final polishing. Whether you’re a beginner or an experienced lapidarist, this kit ensures a flawless transition through each stage for glossy, professional-grade stones.

High Efficiency – Polish up to 25 lbs of Rocks: Each set provides enough grit and media to process up to 25 lbs of stones across multiple batches. Ideal for continuous projects or large-capacity tumblers, ensuring cost-effective and efficient tumbling sessions.

Recommended Usage – For optimal results, use about 2 tablespoons (≈25–30 g) of grit per 1 lb of stones in each stage. Add just enough water to cover the stones inside the barrel and tumble for 7–10 days per step, checking periodically and adding water if needed to maintain smooth rotation. Adjust tumbling time slightly depending on stone hardness and size.

Compatible with All Rock Tumblers: Suitable for both rotary and vibratory tumblers. Perfect for hobbyists, classrooms, and professional workshops alike—KoolStone grit kits are engineered to help you transform rough rocks into smooth, glass-like gems with ease and precision.

We may earn commissions on qualifying purchases.

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300+ sold last month

Lowest ever

Amazon

50000 Grit Aluminum Oxide Rock Tumbler Polish, Step 7 Ultimate Finish | Maximum Refinement for Rocks, Gems, Glass & Jewelry Making, Ultra-Fine Powder, 1 LB Refill, For All Major Tumblers

-10%

$36 .88 $40.98

Lowest ever

Amazon

HopeRock Ultra Quiet Rock Tumbler for Adults, Kids 8+, STEM Science Kit | Noise Reduction Cover, 3 Speed Settings, 9 Day Timer, Polishing Supplies, STEM Geology Activity, Beginner Friendly, Green

-20%

$39 .99 $49.99

300+ sold last month

Amazon

Knife Sharpening Stone Set, Professional Whetstone 4 Side Grit | 400/1000 3000/8000, Whetstone Knife Sharpener Stone Set Include Non-slip Base, Leather Strop, Flattening Stone & Angle Guide

-20%

$23 .99 $29.99

2,000+ sold last month

Lowest ever

Amazon

1.5LB 12000 Grit Aluminum Oxide for Final Finish, Step 5 Advanced Polishing Tumbling Filler,Rock Tumbler Polish for Micron Finish

-15%

$21 .99 $25.99

Amazon

Sharp Pebble Whetstone Knife Sharpening Stone Kit - 2 Sided 400/1000 Grit | Razor Sharp Edges at Home - Wet Stone Kitchen Knife Sharpener with Flattening Stone, NonSlip Rubber Base & Angle Guide

-7%

$27 .99 $29.99

500+ sold last month

Amazon

-5%

$27 .53 $28.98

Amazon

Rock Tumbler Grit Step 3, 600 Grit Silicon Carbide Fine Media Refill 5LB | Pre-Polishing For Rock Tumbling, Reduces Fine Surface Marks, Creates The Ideal Base For Step 4 Final Polish, Smoother Finish

-5%

$28 .48 $29.98

Lowest ever

Amazon

30000 Grit Aluminum Oxide Rock Tumbler Polish, Step 6 Ultra-Fine Polish | Advanced Refinement for Rocks, Gems, Glass & Jewelry Making, Ultra-Fine Powder, 1 LB Refill, For All Major Tumblers

-10%

$32 .38 $35.98

Lowest ever

Amazon

Professional Rock Tumbler Kit,3-Speed Motor & 7-Day Timer | Includes Rough Gemstones, 4 Polishing Grits, Jewelry Fastenings, Operating Instruction, Great Stem Science Kit

-6%

$33 .99 $35.99

Amazon

-5%

$28 .48 $29.98

100+ sold last month

Amazon

Sharp Pebble Whetstone Sharpening Stone 3000/8000 - with Flattening Stone | 3000 Grit Fine Sharpening & 8000 Grit Polished Finish - Kitchen Knife Sharpener Stone Kit with Non-Slip Bamboo Base

-5%

$32 .29 $33.99

100+ sold last month

Amazon

K4 Quiet Rock Tumbler Kit for Adults, 7LB Large Double-Barrel | Professional Brushless Polisher with Noise-Reducing Cover, Complete Kit, STEM Gift For All Ages

-25%

$149 .98 $199.99

300+ sold last month

Amazon

G2 Dual-Barrel Professional Rock Tumbler Kit, 8LB for Adults | Brushless 8Lb (4LBx2) Rock Polisher, Heavy-Duty Metal Base, 3 Speeds, 9-Day Timer, for Big-Batch Rock Polishing

-19%

$169 .98 $209.99

100+ sold last month

Amazon

K1 Pro Professional Rock Tumbler Kit for Adults, 2.5Lb Barrel | 75% Quieter Brushless Rock Polisher, 40,000-Hour Motor Life, Pause & Memory, Complete Gem Polishing Kit, Gift For All Ages

-10%

$89 .98 $99.98

200+ sold last month

Lowest ever

Macy’s

Mindblown Motorized Rock Tumbler Set, Ages 8+

-50%

$19 .99 $39.99

Lowest ever

Amazon

16 Pack Diamond Polishing Paste Kit, 80,000 to 320 Grit Lapping Compound Set, 5 g Syringes with Different Diamond Concentrations, Oil-Based Polishing Compound for Marble, Glass, Metal, Rock, Jewelry

-6%

$15 .99 $16.98

Lowest ever

Amazon

Large 3LB Professional Rock Tumbler Kit - Noise-Reduction & Brushless Motor Rock Polisher, Polisher with Belts, Rough Gemstones, 4 Polishing Grits with 4 Pounds Rock Tumbler Grit Kit

-30%

$110 .93 $158.47

Lowest ever

Amazon

6LB Rock Tumbler Grit Kit & 8000 Grit Aluminum Oxide

-29%

$54 .65 $76.96

Lowest ever

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

Amazon

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

-23%

$79 .75 $102.96

Amazon

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

100+ sold last month

Lowest ever

Amazon

8000 Grit Aluminum Oxide Rock Tumbler Polish 5 LBS, Step 5 Final Refill | High Gloss Polishing Powder for Rocks, Gems, Glass & JeweFinishing, Large Refill for All Rock Tumblers

-5%

$43 .65 $45.98

Amazon

2lbs River Rocks, 2/5''-4/5'' Small Pebbles, Decorative Stones (32oz,Mixed) | Pre-Water-Washed, Hand-Picked, for Indoor Plants, Fish Tank, Vases, Succulents, Terrarium (Approx 80-90 Rocks per 2 Lbs)

-23%

$9 .99 $12.99

Amazon

Rock Tumbler Kit for Adults Kids Barrel Rock Polisher Tumbler Kit | Rough Gemstones 4 Polishing Grits - LCD Display 9-Day Timer 9-Speed Motor - Complete Rock Tumbler Kit, STEM Science Hobby Kit

-21%

$49 .99 $62.99

Amazon

Dremel 84922 Silicon Carbide Grinding Stone

-21%

$6 .29 $7.99

100+ sold last month

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

C1 Rock Tumbler Kit, 2.5LB Quiet Rotary Tumbler for Adults & Beginners | Complete Gem Polishing Kit with Rubber Barrel, 3 Speeds, 9-day Timer, Pause & Memory Function, and Included Tumbling Guide

-20%

$55 .98 $69.98

500+ sold last month

Amazon

Dan&Darci Advanced Professional Rock Tumbler Kit - with Digital 9-Day Polishing Timer & 3 Speed Settings - Turn Rough Rocks into Beautiful Gems : Great Science & STEM Geology Toy for Kids All Ages

-20%

$59 .98 $74.99

100+ sold last month

Dan&Darci

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

-10%

$44 .95 $49.95

Amazon

Rock Tumbler Double Drum 6LB Lapidary Polisher

-10%

$89 .99 $99.99

Amazon

K2 Rock Tumbler Kit+ 4 LB Rock Tumbler Grit Kit

-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

Amazon

25000 Grit Rock Tumbler Polish 5 LBS– Ultra Fine Aluminum Oxide Final Stage Powder, Step 5 Polishing Grit for Lapidary, Gemstone, Rock & Glass Surface Finishing, for Rotary & Vibratory Tumblers

-5%

$56 .98 $59.98

Amazon

Decorative River Rocks & Landscaping Pebbles for Potted Plants | Smooth Polished Pebbles for DIY Resin Art, Vase Fillers, Aquarium Gravel, and Potted Plants(Black, 5 Pounds)

-5%

$11 .82 $12.45

Amazon

0.4-0.8" Polished Pebbles, Pebbles for Indoor Plants (2lbs,Mixed) | Natural Stone, Paraffin Wax Polish, Promotes Soil Drainage, for Succulents & Tiny Vases, Approx 0.5-1.0 cups

-23%

$9 .99 $12.99

Lowest ever

Walmart

Hot Bee Rock Tumbler Polisher Science Kits Set for Kids and Adults, Tumbler Grits, Rocks & Jewelry Polishing Accessories Set for Beginner

-17%

$49 .99 $59.99

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PlayBolt 6-Inch Mini Footballs for Kids (Pack of 5) - Inflatable PVC Football Toys for Boys & Girls w/Hand Pump, Easy to Grip Small Sports Balls for Backyard, Recess, Party Favor, Indoor/Outdoor

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PlayBolt 6-Inch Mini Footballs for Kids (Pack of 5) - Inflatable PVC Football Toys for Boys & Girls w/Hand Pump, Easy to Grip Small Sports Balls for Backyard, Recess, Party Favor, Indoor/Outdoor

-25%

$14 .99 $19.99

400+ sold last month

Halloween Stencils for Painting on Wood 12" Halloween Stencils for Crafts | Reusable Half Circle Hey Boo Ghost Trick or Treat Welcome Stencil for Door Hanger Doormats Fabrics

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Halloween Stencils for Painting on Wood 12" Halloween Stencils for Crafts | Reusable Half Circle Hey Boo Ghost Trick or Treat Welcome Stencil for Door Hanger Doormats Fabrics

-10%

$8 .99 $9.99

KYOQFVN 4 Pack 3D Pearl Christmas Wall Art Kit, DIY Christmas Pearl Diamond Painting Kit, Diamond Dots Beads Painting for Home Wall Decor 12×12 Inch

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Amazon

KYOQFVN 4 Pack 3D Pearl Christmas Wall Art Kit, DIY Christmas Pearl Diamond Painting Kit, Diamond Dots Beads Painting for Home Wall Decor 12×12 Inch

-10%

$17 .99 $19.99

Electric Train Set Race Track for Kids 3 4 5 6 7 8 Years Old | 138PCS 3D Anti-Gravity Race Track with 2 Motorized Cars, STEM Train Set Toys Birthday Gifts for Boys Girls

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Electric Train Set Race Track for Kids 3 4 5 6 7 8 Years Old | 138PCS 3D Anti-Gravity Race Track with 2 Motorized Cars, STEM Train Set Toys Birthday Gifts for Boys Girls

-10%

$44 .98 $49.98

700+ sold last month

Busy Board Toys for Toddlers Girls Boys 1 2 3 4 5 Year Old, Montessori Learning Toys for Toddlers 1-3, Birthday Gifts Toys for 1 2 3 4 Year Old Girls

Lowest ever

Walmart

Busy Board Toys for Toddlers Girls Boys 1 2 3 4 5 Year Old, Montessori Learning Toys for Toddlers 1-3, Birthday Gifts Toys for 1 2 3 4 Year Old Girls

-47%

$15 .99 $29.99

Crochet Advent Calendar 2026, 12 Handmade Crochet Animals | 12 Handmade Crochet Animals with Positive Cards for a 12-Day Christmas Countdown, Emotional Support Gifts for Teens & Adults

Amazon

Crochet Advent Calendar 2026, 12 Handmade Crochet Animals | 12 Handmade Crochet Animals with Positive Cards for a 12-Day Christmas Countdown, Emotional Support Gifts for Teens & Adults

-9%

$29 .99 $32.99