It is important that silicon carbide grit is used as rock tumbler grit because it has a hardness of 9 on the Mohs scale and doesnt round out when being tumbled.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[728,90],'rocktumbling_co-large-leaderboard-2','ezslot_6',140,'0','0'])};if(typeof __ez_fad_position != 'undefined'){__ez_fad_position('div-gpt-ad-rocktumbling_co-large-leaderboard-2-0')}; Because grit is so hard, as you may have noticed in your tumbling, some softer materials containing different mineralization elements such as calcite may be gouged out and can give the rocks a texture. Shaping, smoothing, and polishing your rocks into things of beauty. Protect and cushion fragile stones and reduce tumbling noise. A five-step refill kit, this set includes all that you need to give your stones a wonderful and lasting shine. Maybe you are asking yourself if you are using too much or too little grit for tumbling. Questions? The best grit to use on coins is pea gravel.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[250,250],'rocktumbling_co-large-mobile-banner-1','ezslot_5',147,'0','0'])};if(typeof __ez_fad_position != 'undefined'){__ez_fad_position('div-gpt-ad-rocktumbling_co-large-mobile-banner-1-0')}; Before you tumble your coins, you will want to separate your valuable old coins from your clad as there are less destructive cleaning methods available to clean valuable coins. Replenish your rock tumbler for more rock tumbling fun! However, the slurry that your tumbler creates can be used from the previous stage to help the grinding action. The third stage bag contains just over two tablespoons of grit. This universal grit works with any rock tumbler, but it works best with a mechanical machine and has been specifically rated for three-pound, six-pound, and fifteen-pound tumblers. Contains a total of 2 lb. You can buy grit as your local rock shop, but it can be much more convenient to buy on websites like Amazon. And Grit 4 will provide the final polish. This will make it much easier to store and use when necessary. Includes instructions, grit, jewelry mounting hardware, a tumbler & more! Polly Plastics Rock Tumbler Grit Kit contains all the material you need for polishing all of your rocks and precious stones. It is used during the first stage of rock tumbling. [Win-win] Brave Finder respect and put buyers' needs first. Warning:This product can expose you to Respirable crystalline silica, which is known to the State of California to cause cancer. Packaged in 4 bottle to safely store unused product for later. tumbler or five 3 lb. For use in all Rotary Tumblers. Note: Specifications are approximate and subject to change. This tumbling grit can be used in any kind of rock tumbler that you might have. Sometimes people use 45-70 grit for faster grinding on hard rocks. Small Ceramic Rock Tumbling Media. This grit refill kit is a fantastic set for those interested in getting into the hobby, as it includes all of the grit material necessary to begin. of our premium plastic pellets for protecting and cushioning fragile stones while tumbling. This stage prepares your rocks for the final polish. And as an Amazon Associate, we earn a commission on qualifying purchases after clicking on those links, at no additional cost to you. This gives it a lot of versatility and is a perfect tester kit for those starting out with the hobby or experienced users who want to test out a new rock tumbler. Everything you need to know to find the best tumbling grit. This is a four-step grit refill pack that weighs in at three pounds. MADE IN THE USA Polly Plastics is an American company with American sourced materials for superior quality control and reduced risk of contaminants. For California consumers: more information about our privacy practices. Polly Plastics Rock Tumbler Grit Kit contains all the material you need for polishing beautiful stones. of pre-polish. each but all are sold in the same size jars for packaging consistency. This is not to be confused with grit used in lapidary machinery like saws and grinders. It is also recommended to use plastic pellets to help cushion the stones as the polish stage is where you will notice the most breakage.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[970,90],'rocktumbling_co-mobile-leaderboard-2','ezslot_15',143,'0','0'])};if(typeof __ez_fad_position != 'undefined'){__ez_fad_position('div-gpt-ad-rocktumbling_co-mobile-leaderboard-2-0')}; Because grit gradually breaks down as youre tumbling, you cannot reuse it. If you are not satisfied with the kit, we'll refund you 100% of the money, no questions asked. [COMPATIBLE WITH ANY BRAND TUMBLER] Tumbler-Polishing-Grit-Refill-Kit-for Polishing Agate-Jasper-Sea Glass- Gemstones Turquoise Sun Stones Obsidian Quartz Crystals Healing Stones. jars of Stage 2 media grit for transforming rocks and gemstones into beautiful treasures. Weve included complete instructions so even beginners will be able to be successful tumblers. This grit is compatible with any brand of the tumbler, so you do not have to be concerned that it will not work with yours. This grit refill kit comes with a plastic scoop for easy measurement and dispensing to your rock tumbler, Compatible with all types of rock tumblers, Individual jars make it extremely simple to store when not in use. And theres no reason you cant use this grit even if you dont have the National Geographic rock tumbler. It contains the supplies required for four-stage silicon carbide grit rock tumbling. Perfect for hobbyists as well as the professional craftsmen, this rock polishing abrasive works with rotary tumbler rock polishers to bring out the shine in rocks and semi-precious stones or clean rusty nuts and bolts. We're always here to help if any quality issues and about the rock tumbler grit kit. 180/220 Medium Silicon Carbide Grit. Science Kits for use with Abeka Curriculum, Free Economy Shipping on Your First Order of $50+. To accomplish this, the grit used is not as coarse as the first stage and is a bit softer. Even though there are different kinds of rock tumbler grit, silicon carbide is the preferred grit for rock tumbling. Check our rock tumbling library. While it is understandable that you will want to reuse your rock tumbling grit as many times as possible, the grit used in the first three stages is not meant for reuse. BEGINNER FRIENDLY - 100% satisfaction guarantee on all our products. For any difficulty using this site with a screen reader or because of a disability, please contact us at 1-800-444-3353 or cs@harborfreight.com. They won't let you down, no matter what they're up against. The idea is to use them across different stages in the tumbling process, resulting in smoothly polished stones. Get professional rock polishing results with this high-quality Lortone tumbler and deluxe rock tumbling kit. You can then dispose of it in your trash can. The 4 Step Kit contains: 1 lb. Rock Tumbling Grit Two Pack Step #3, Pre-Polish 500 Silicon Carbide - 1 Lb. Provides a full five pounds of polishing grit, so you wont have to worry about refilling for a while, The polishing stage often requires plenty of material, so being able to buy this separately is a big plus, Its important to seal the bag up tightly when not in use to prevent unwanted spillages. click here to see our complete list of the best rock tumblers! This stage reshapes your rocks into more round looking stones. This grit refill pack has four steps to ensure proper polishing. ), Instruction Guide, Compatible with all rock tumblers: Can be used in tumblers from any brand: Dan&Darci, Elenco, Lortone, National Geographic, Smithsonian, Thumler and more. This includes, among others, the Amazon Associates Program for which, as an Amazon Associate, we earn from qualifying purchases. However, you will eventually have to change it. We use re-usable jars that wont break and cause a mess. total. Poly Pellets Rock Tumbling Media - 2 lbs. This system is the perfect method for making rough rocks look smooth and polished. Contains different grits & polishes for professional-quality four-stage rock tumbling. Our reviews are unbiased, and our opinions are our own. Get professional rock polishing results with this Lortone double-barrel rock tumbler and deluxe rock tumbling kit. The World's Largest Rock Tumbling Library, Save Time and Money with a Vibratory Tumbler. We use about two level tablespoons of grit per pound of rock in a rotary tumbler and 1/2 tablespoon of grit per pound of rock in a vibratory tumbler. Free shipping. And your satisfaction is our top priority so we offer a money back guarantee on all our products, no questions asked. It is part of a set of products from the National Geographic Society, which includes rock tumblers, rock refill kits, ceramic media, and gem foam. I like to do low number grit tumbling in a rotary tumbler. For best results, use with National Geographic Rock Tumblers and rock tumbling supplies. In the next step, you used the medium grit to continue the process of smoothing the rocks out further. 2 pack 3 lbs. Packaged in easy-to-use-and-store bottles, Includes: Step #1 Coarse Grit (1 lb. The National Geographic grit refill kit is compatible with any rock tumbler that you may have. ), List of Rocks, Minerals, and Gemstones Found in Indiana, 13 Different Types of Yellow Rocks and Minerals (With Pictures), 1 lb. After a full week, some rocks will need to be put back into a new batch of stage 1 to get the desired round (or pitless) look. This refill kit is compatible with all rock tumblers. of premium plastic pellets for protecting and cushioning fragile stones while tumbling. Stage 3 (using 500 grit), prepares the stone for the final polish, sometimes giving it a polish look. About Us Shipping Refunds International Mail Orders P.O.s Contact Us Privacy. An excellent choice for any hobbyist or lapidary enthusiast, this classic NSI rock tumbler kit transforms rough rock into beautifully polished stones. The grit is fully compatible with all types of rock tumblers, including the likes of National Geographic, Elenco, Lortone, and Smithsonian. Step 1 - 1 lb. The polypropylene plastic poly filler pellets are used to fill up space in the tumbler when there are insufficient rocks to do the job. You can, however, add a small amount of sand or silt during the beginning of your grinding stages if you have no used slurry. It comes with a satisfaction guarantee from the National Geographic Society which provides a little extra peace of mind. 4-Step grit pack with 3 pounds of total weight. If you have pennies with your nickels, dimes, and quarters, you will turn them to a copper color. After that, you close the barrel. The design of each grit does a particular job, so by combining them in the appropriate steps they produce the best results. We recommend purchasing a separate container that you can clearly mark and fill with this material. Because this refill kit comes with instructions, it is perfect if you are starting without any experience. HIGH-QUALITY EDUCATIONAL TOYS - National Geographic is proud to make the highest quality hands-on science toys, and all our products are backed by exceptional service. Made in the USA. Perfect for beginners looking to expand their collection of grit, or seasoned veterans refilling for their next batch, this set will never let you down and is an excellent way to obtain in bulk, without having to deal with bags. How much grit do I use in a rock tumbler? of premium high-impact polypropylene plastic filler pellets. These varying sized granules are used for shaping, smoothing and polishing rocks in a rock tumbler. Even if you dont own such a large-capacity rock tumbler, youll be able to use this product multiple times instead. tumbles. We guarantee our products and service won't mess up your science studyno matter how messy it gets. If you live in an area where you do not have a yard, dump the slurry in a container and let it dry out. The amount of grit that you add to your rock tumbler ultimately depends upon how much rock you are going to be tumbling, as well as the barrel size of your rock tumbler. Much like sandpaper, grit comes in varying abrasive consistencies that are to be utilized at different stages of the process. We do not publish sponsored reviews; however we may earn a commission when you purchase something using one of our links. Lortone is known for their quiet, durable rock tumblers, and this one can hold up to 3 pounds of rock at once! Transform your unrefined gemstones into beautiful works of art with this medium grit refill pack. Easy to use: Includes a clear instruction guide on how to use the grits and plastic pellets. 100% Satisfaction Guarantee! Silicon carbide can be crushed into sharp, angular particles. See delivery options in cart. For most hobbyists, we recommend the Polly Plastics Grit Kit which gives you all four types of grit for each stage of the tumbling cycle. Garnets, for example, may be as hard as grit, however, they still round out when being used as grit. Juststore whats left for later. The type of refill kit that you get will depend upon how much rock tumbling you do and how serious you are about it. coarse grit, 4 oz. Also included is 1 lb. I just recently purchased one of these to tumble agates and jasper, and its worked just perfectly. This is a four-stage rock tumbling medium refill kit that weighs in at three and a half pounds. Get enough grit to polish 3 pounds of rock. This grit pack weighs in at just under a half of a pound and comes with all of the four basic grit types, as well as an instruction manual. SUPERIOR PACKAGING - Packaged in durable, re-usable jars to prevent messy spills and to safely store unused product for later. ), Tonmp 3 Pounds Rock Tumbler Refill Grit Media Kit, This kit comes with simple instructions, making it easy to get reliable results right from the start, Arrives with four distinct types of grit, no extra material is required, This product is beginner-friendly so you can get started quickly even without experience in tumbling rocks, Because the filler is plastic it needs to be washed after every use, so as to clean away bits of rock that stick to it. Also, you will want to separate your copper from your other coins. RockTumbling.co is supported by our readers. Similar to sanding down wooden furniture, the grit in your tumbler provides an abrasive substance to remove imperfections, finesse the shape and bring out the natural patterns and colors that lie under the surface. Unless you are tumbling heavy loads of hazardous rocks, disposing of the slurry in your woods or driveway is fine. A rule of thumb is that, if you see grit at the bottom of your barrel after one week, you are using too much grit. Elenco, Lortone, National Geographic, Smithsonian, Thumler and more! ), Step #3 Pre-polish Grit (1/2 lb. It is hard to say how long stage one should take because everyone has their preferences. Use this 2-pound bag of Brazilian tumbling rock (lapidary rough) in your rock tumbler and see it become beautiful polished stones! It comes in a five-bottle set that contains the four types of grit and the filler. How can I safely dispose of used grit (or slurry). Polly Plastics Rock Tumbler Grit Refill, Polly Plastics Rock Tumbler Tumbling Media Grit Kit & Plastic Filler Pellets, NATIONAL GEOGRAPHIC Rock Tumbler Grit - Rock Polishing Grit Media, Polish Up to 20 lbs. Rock Tumbling Grit Two Pack Step #2, Medium 180/220 Silicon Carbide - 2 Lbs. GRIT SOLD BY WEIGHT NEEDED FOR EACH STEP Steps 1 & 2 are 1 lb. After this process, your rocks will have taken on a whole new appearance! The first step is sixty coarse silicon carbide grit. The different weights, along with different densities, will mean that jars will not have equal amounts of fullness. See Delivery Options In Cart. Can be reused. ), Step #2 Medium Grit (1 lb. Each to have pretty rocks/gems. This grit refill kit comes with a ten-milliliter scoop so you can scoop out precisely measured amounts of grit material, We wish this kit came with a measuring device for your rocks, so you know exactly how much grit to use, HIGH QUALITY - This rock polisher grit refill pack comes with enough high-quality silicon carbide grit to put a dazzling polish on up to 20 lbs. Sometimes, dumping slurry on grass can make a dead spot because it suffocates the grass roots from light and water. If youre looking for a very high quality rock tumbler, you really want to take a look at the Loratone 3A rock tumbler. The kits Will work with all rock tumbler.Makes high quality rock tumblers and materials. In this stage you MUST use plastic tumbling pellets to prevent your rocks from hitting against each other and ruining all of the hard work youve put in so far. 60/90 Coarse Silicon Carbide Grit, 1 lb. polish, and 2 oz. It also depends upon whether you are a beginner or experienced with the process. Both durable & easy-to-use, this rock tumbler completely polishes a batch of rocks in just 4-6 weeks. These can be for jewelry, gemstones, rocks, or just about anything you can imagine! On my gravel driveway, I like to mix the slurry with gravel to fill in potholes. Polish rocks twice as fast with this quality Lortone 33B double-barrel rotary tumbler. An excellent way of refilling your grit supply, no matter how long you may have been rock tumbling, the instructions that come with this kit are clear enough to help a beginner with his first tumbling session. The third step is five hundred fine silicon carbide. If youre new to the rock tumbling hobby, or just checking it out, you might find my post, The Best Rock Tumbler For Beginners: Take Your Hobby To The Next Level to be helpful to you on your search. They're not happy until you are. Rock tumbler grit is the stuff we use inside the rock tumbler to bring rocks to a nice smooth finish. Cheap grit is also a little bit softer than better grit which means it will not last as long. COMPATIBLE WITH ALL TUMBLERS - Our universal grit is designed for any rock tumbler. For quality grit, you can expect to pay around $5 per pound. Each level of grit in this kit has a unique purpose when tumbled with your rough stones. What kind of grit should you use and can you make your own? This particular type of grit is used in the final stages of polishing gemstones. Beyond coins, if you want to shine up other metals, crushed walnuts are the media of choice. Polly Plastics is packaged for you at 3700 James Savage Road, Midland, Michigan. This grit refill package contains two one-pound bottles of stage medium 180/220 silicon carbide grit. This grit pack has enough grit for one round in a three-pound tumbler and three rounds in a one-pound tumbler. This kit comes with a set of easy-to-read instructions that will help you to get started right away, even if you are a beginner. After low grits are done, I would use pre-polish grit and polish in a vibratory tumbler.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[300,250],'rocktumbling_co-leader-4','ezslot_13',145,'0','0'])};if(typeof __ez_fad_position != 'undefined'){__ez_fad_position('div-gpt-ad-rocktumbling_co-leader-4-0')}; You will typically start out with stage 1 using either 45-70 or 60-90 grit. The most popular types of polishing compound are: Aluminum oxide is the typical polish most people use and is the cheapest. The slurry will be the fine sediment left over in your tumbler. What grit do I use for vibratory tumblers? For the polish stage, you do not want any slurry or grit in the barrel from your prior stage. Use these plastic pellets in your rotary tumbler to cushion the rocks you want polished. After your final barrel cleaning, youre finally ready for the polishing stage! Count on friendly voices at the other end of the phone and expert advice in your inbox. of Rocks, Works with any Rock Tumbler, Rock Polisher, Stone Polisher, Dan&Darci Rock Tumbler Grit Refill Kit - 3.5 Pounds Grits Media + Poly Plastic Pellets - Rock Polishing Media - Polish for Any Brand Tumbler - Rock Tumbling Supplies - Stone Polisher, Tonmp 3 Pounds Rock Tumbler Refill Grit Media Kit (4 Polishing Grits)| 4-Steps for Tumbling Stones, Rock Tumbler Refill Grit Media Kit, Stone Polisher (3.5 Pounds Polishing Grits + Poly Plastic Pellets), Compatible with Any Brand Tumbler, 5-Steps for Tumbling Stones, Fundamental Rockhound Products: 5 lb 150/220 Medium Rock Tumbling Grit polishing Silicon Carbide 150 220, MJR Tumblers Refill Grit Kit for 18 LB Rock Tumblers Silicon Carbide Aluminum Oxide Media Polish, Polly Plastics Rock Tumbler Media Grit Refill, Medium 180/220 Silicon Carbide Grit, Stage 2 for Tumbling Stones (2 Pack) (2 lb. 500 Fine Silicon Carbide and lb. You can purchase this product with the confidence of a one hundred percent satisfaction guarantee. This is a nice package of tumbling rock ready for use in your rock tumbler. You can use this kit in a fifteen-pound tumbler or five times in a three-pound tumbler. 2 pack 3 lbs. It consists of AAA quality graded grit that is just the right size for etching glass. The purpose of the plastic filler is to protect and cushion fragile stones during tumbling. This is a form ofgrit that is so fine that it gives the stones a polish. Includes 4 oz. [EASY TO USE] Includes a clear instruction guide on how to use the grits and plastic pellets.Large Amount of Grit, This is a large amount of each size grit for the price. The fourth and last step is twelve hundred aluminum oxide polish. If you need some extra medium grit this package may well be the perfect solution. Most commonly grit is sold in 1 and 5-pound containers. You want to remove ALL of the grit from the barrel and the rocks before moving on to the next stage. BEGINNER FRIENDLY - Complete, easy-to-follow instructions included. Grit 3 will develop them for the final stage. 100% satisfaction guarantee on all our products. These stages start with a very coarse rock tumbler grit and gradually work all the way down to a very fine rock tumbler grit. PLEASE NOTE: Due to ongoing supply issues with this product, alternative brands may be substituted. The pack is beginner-friendly, including a one hundred percent satisfaction guarantee. Bottom line? 1200 Aluminum Oxide Polish. So, if you are interested in rock tumbling, you are going to need to periodically refill your grit supply. tumbles. Take a look at the customer reviews below to discover why this grit and rock polisher pack has a near 5-star rating! This is called the shaping stage. It also makes a fantastic gift for a rock tumbling enthusiast due to the sheer variety of rocks that you can polish using this set. Leaving metal wet after tumbling will cause it to tarnish and oxidize quickly.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[970,90],'rocktumbling_co-narrow-sky-1','ezslot_17',148,'0','0'])};if(typeof __ez_fad_position != 'undefined'){__ez_fad_position('div-gpt-ad-rocktumbling_co-narrow-sky-1-0')}; The biggest thing to look for when purchasing grit is a trustworthy source. Polly Plastics Rock Tumbler Media has been my go to tumbling grit for a long time now. Rock Tumbling Grit Kit with Plastic Filler, Rock Tumbling Grit Kit with Ceramic Filler. The one variable in this process is the amount of grit that you place in the rock tumbler. As a rule of thumb, follow this four-step process to achieve the best results: To help you find the perfect grit for your tumbler, weve put nine options together with complete four-stage sets or individual bulk-buy grits to choose from. Designed for seasoned rock tumbling enthusiasts that are looking to stock up on supplies, five pounds of polishing grit will certainly last you for many sessions to come. Get in touch with our Customer Service team. Some of the links on our website are affiliate links. Pennies struck before 1983 are copper, so be sure to pull those out (if you can even read the dates). 500 Fine Silicon Carbide, lb. [5 STEPS] Just measure in the grit, add enough water to cover the stones, seal the barrel, and tumble. COMPLETE KIT - 4 Step grit pack and plastic filler for use in 15 lb. Also, these DIY materials are usually not as hard as silicon carbide, so it will take a lot longer to achieve results. This article covers everything you need to know about grit.if(typeof ez_ad_units != 'undefined'){ez_ad_units.push([[336,280],'rocktumbling_co-banner-1','ezslot_16',139,'0','0'])};if(typeof __ez_fad_position != 'undefined'){__ez_fad_position('div-gpt-ad-rocktumbling_co-banner-1-0')}; Grit is the media used to grind down and shape stones or other objects in a tumbler and is made of silicon carbide. This grit pack comes with ceramic filler that can be used once in a fifteen-pound tumbler or five times in a three-pound tumbler. This tumbling grit kit contains: This is another great kit that provides all the tumbling grit you need to go from rough rocks to polished gemstones. The second step is 180/220 medium silicon carbide grit. 500 Fine Silicone Carbide, Step 4 - 1/2 lb. Do not dump slurry or clean your rocks in a sink or bathtub. It contains the following silicon carbide grits and aluminum oxide polishes for professional-quality four-stage rock tumbling: This is our most economical rock tumbling gritpackadjust the rock polishinggritsizes and the quantity of grit for each stage to best meet your needs. Some people like to tumble modern coins found with a metal detector. Make sure that you dry off any metal immediately and put it in an area that gets much airflow. If for ANY reason you are not satisfied with this item, you may return it within 90 days for a full refund or replacement. Whether it's (over)eager young scientists year after year, or rigorous requirements that come once-in-a lifetime. Stage 4 is where you use your polish which takes one week to 1 month depending on the desired polish and material type. This kit is not part of a set so it works just as well regardless of the machine that you put it in. We get it. As for the types of grit included, youll find this set contains coarse grit, medium grit, pre-polish grit, polish grit, polypropylene plastic poly filler pellets, and an instruction guide on how to most effectively use them. Have a question? Fossils, Amethyst, Citrine, Quartz, Fluorite, Celestite, Jaspers, Petrified Wood, Make Your Own Rock Tumbling Grit Substitute, How To Use A Sluice Box To Find More Gold: A Must For Gold Prospectors, The Best Rock Tumbler For Beginners: Take Your Hobby To The Next Level, Rockhounding In New Mexico! Our products are durable, reliable, and affordable to take you from the field to the lab to the kitchen. Depending on if you want a more natural look or a flawless tumble, stage 1 can take as little as one week up to many months. These rock polishing abrasives include four different grits to use depending on the application. A great starter kit for someone just starting out with tumbling stone polishing. By buying in bulk, youll save yourself time and money in the long run. Need It Fast? Because rocks vary in hardness, it is standard practice, for pre-polish and polish stages, to separate the rocks out by hardness. Stage 3 can take as little as three days to 1 week. Because of this change in different kinds of tumbler medium, it is very important to do a thorough cleaning between stages. Medium 180/220 Silicon Carbide Grit. If you do not take this step your final polishing results will not be as good as they should be. The first, second, and fourth stage bags each contain three tablespoons of grit. It resembles little ball bearings allowing your stones to tumble smoothly. You can get more information on the Lortone 3Ahere. After a week or so in this stage, your rocks should come out looking brilliant and beautiful. Need it fast? Enough for one use in 15 lb. No matter the make of your tumbler, youll rest assured knowing that this grit will work perfectly every time. If you use a vibratory tumbler, be forewarned that the lower size grit you use, the faster you will need to replace the bowl. "Rock tumbler grit", also known as "rock polishing grit", is a silicon carbide powder that is much harder than the types of rocks that are commonly polished in a rock tumbler. Dan&Darci Rock Tumbler Grit Refill Kit, 8. If you do not have a chart handy, the rule of thumb is that you use two to two and a half tablespoons of grit for every pound of rock that you are tumbling. Our universal grit is designed for any rock tumbler. These materials round out when tumbling and become ineffective very fast. Rock polishing abrasives for tumbler-style polishers. This size rock tumbler grit will completely smooth out your rocks, but will not give the high shine that is often time desirable. This can help speed up the grinding action until the rocks create their own slurry. This one is built to last and is used by professional rock tumblers around the world. Whether youre looking to polish gemstones or even glass, youll find it a difficult task without quality silicon carbide polishing grit. However, the intent is to use it as a refill for National Geographic rock tumblers and works best with them. tumbles! EASY TO MEASURE AND STORE - Each rock tumbling grit stage is packaged in a wide-mouth container with secure, screw-top closure. If youre the owner of a high-capacity rock tumbler, then youll want to look into this refill kit from MJR Tumblers. Grit 2 will further smooth them once they are shaped. I just realized it was part of the hobby. Includes fine grit, pre-polish, and polish (super fine). Use this rock tumbler grit kit to transform rough rocks into smooth, shiny collectibles! And the best thing about the Lortone 3a was just how unbelievably quiet it was. total, Large Ceramic Rock Tumbling Media. A thorough cleaning of the barrel is absolutely necessary between each stage. MJR Tumblers Refill Grit Kit for 18 LB Rock Tumblers, 9. 180/220 Medium Silicon Carbide Grit, Step 3 - 1/2 lb. The only variable is how much of the product to use in your rock tumbler. Designed as a single-use grit pack when used in a three-pound tumbler, it has four steps and comes with three ounces of 60/90 coarse, three ounces of 120/220 medium grit, one and a half ounces of five hundred fine silicon carbide grit, and one and a half ounces of 1200 aluminum oxide polish. Get four stages of grit: coarse, medium, pre-polish, and polish.