KoolStone C1 Rock Tumbler Kit - Professional Large 2.5LB Capacity, Up to 5X More Noise Cancelling, Adjustable Timer & Speed with Full Accessories & Memory Function

Edit 11/29/23. Still love this tumbler. Had a problem with it. Contacted customer service and they took care of it right away. Awesome company, and the best service! Makes a terrific gift for the holidays. We got one for our grandkids this year. Got this tumbler for Christmas. Favorite gift this year. I Love going out and Beaching and finding Afates, Jasper and Quartz treasures. This unit is great! It's quiet, works well and the company has responsive customer service. It comes with a beautiful color instruction manual. The manual isn't bad. But I've learned from groups that tumble on Facebook and forums that there are several things tumbler manufactures get wrong in the instructions. The biggest one is speed. This tumbler spins too fast in all speeds and will bruise stones easily if you run it in speed 3 or 2. So always run it on speed 1. The manual lists RPMs at the axle I timed the RPMs of the barrel and that is rotating at 70-90. It is still faster than recommended but if you fill the barrel as close to 3/4 as possible along with ceramic filler you can minimize bruising. I included picks from my 2nd Tumble and they turned out good with speed 1 and mostly full tumbler. After first cycle you will need to have filler for other 3 cycles. Ceramic works but if you don't have enough ceramic to fill close to 3/4 I found decorative glass beads at the dollar store that work great as filler. I also use 2 tbs of Borax between each cycle and run for 2 hrs will clean the grit from rocks and tumbler pretty well which is essential por good polish. After polish cycle I run for 2 hrs with 2 tbs Ivory soap flakes to help increase shine. Also be careful in cycle one with small stone as this tumbler turns very fast and small stones can dissappear if you run it for a full week. So I check after 4 days to see if I should pull them out and sub in glass beads as filler. Some stones make take more than a week in first cycle. Agates take awhile and you don't wants pits or irregularities to carry grit into polish cycle. So I try to get very smooth in first stage. Anyways this tumbler is alot of fun and I am looking to purchase other tumblers now. I am particularly interested in a vibratory tumbler, they are much faster and use less grit. Potentially you can have polished rocks in a week instead of a month.

This is an excellent tumbler that does what it's supposed to do. It provides a simple introduction to rock tumbling for the young adult beginner yet will give you beautiful professional results if you use it the way the pros do. You might not get pro results following the instructions the first time. Remember, it's just an introduction providing an overview and demonstration of tumbling. If the kit ends up giving you nicely rounded but very dull unfinished stones like I experienced, you'll be disappointed of course and think the tumbler stinks. But make sure you watch a few pro tumbling YouTube videos after your first experience with this kit. Then you'll know what to do the next time. For example, I found Cycle #1 at Speed #3 just too fast. The stones got really beaten up, and the tumbling was pretty loud. It might need to tumble much slower. I also tumble coins I find ocean beach metal detecting. This tumbler is perfect for cleaning up those nasty coins that have been in salty sand/salt water for weeks and months. I've attached some before and after self-explanatory pics including rows of washed and dried coins, drums before and after each type of coin and the tumbling medium. I won't go over the contents of the whole kit. Other reviewers have listed everything. It may seem at first like a cheaply built toy tumbler when you first pull it out of the box having been very nicely packed, but this is not a junky toy. It is built to do the job. If you treat it right, it will last. When you open the box, don't take the tumbler out yet. Pull out the water resistant, very well written and thorough manual. Read it cover to cover. I could describe all the dos and don’ts here, but the manual does the job quite well. I've read the reviews. From the problem descriptions, you'll understand that some folks simply didn't read the manual through. But if you have any problems at all or don't quite understand what to do contact Customer Service. You'll get Anne or Daisy. Daisy is 24/7 amazing. She’ll talk you through any issue or problem you’re having. Customer Service is not an easy job. But she (and Anne) will not stop until you're happy. You've seen their great reviews. But they're understatements. Daisy.....10 stars!

The item itself works well. The item came with three power drive bands for tumbler. Two bands broke before 2 of 5 steps of polishing finished. I contacted vendor for new bands as advertised by vendor. I provided my address in Missouri via Email. Received an email they would send replacement bands immediately (stated I should receive in 5 to 7 days. 8 days I received email asking if I had received the bands. No I have not. Next day I got the proof of delivery, delivered to a PO Box in Carbondale West Virginia. This state and city is 820 miles and 13 hour drive from my address. I boxed tumbler in box, attached my return label and dropped at my Post office. Amazon credited some of my payment back.

Great tumbler! We started it soon after receiving it and kept it going. It is super easy to use and great value. Our 8 year old grandson has enjoyed learning about different rocks and seeing how they polish up. The base quit after 4 months and was promptly replaced under the warranty. Special shout out to Kool Stone and Daisy for exceptional customer service! I definitely recommend this tumbler.

The tumbler works well, and their customer service is great. Daisy was really quick to respond and friendly. Thank you!

Worked for a month then the motor gave up, I followed all the instructions on weight. The belts are also poor quality, went through 2 In just a month.

Works great, it's not overly noise, easy to use and amazing customer support. I did kinda expect the rocks to come out more shinning but I'll keep playing around it it. Overall, it's great

Fantastic customer service! Responded to my emails so quickly and sent a new part so fast when we a piece was not working. Also, we love the rock tumbler! My son has been enjoying it so much.

UPDATE - 4 STARS - I originally gave this a 1 star rating (see below). After leaving that review I contacted customer service for KoolStone directly (information on box). They were very prompt with their replies and immediately sent me out a new base and belts, the barrel was completely fine and did not need to be replaced. The replacement tumbler is running and so far seems to be working well. I have upgraded the review to 4 stars since they made it right, but I could not leave a full 5 star rating because the first one I received was faulty and did break. I will update this review further once the tumbler has run a few cycles. 1 STAR - The belts didn’t last more than a week each. The tumbler itself completely died after less than 3 weeks of total run time. I didn’t even get to run the full 4 steps before it completely died. I purchased just over 2 months ago and didn’t start using right away, so I am past the return window. Just an expensive piece of trash now. I have family members that tumble regularly, there are many other tumblers that are very similar that do not have issues with breaking belts, or failing motors.