While it may still feel like there is a lot to choose from, you don’t need a lot of of stones, you just a several good varieties to choose from. To summarize I will indicate below what my favourite stones are in each grit. Yes you can mix up the brands when sharpening but my recommendation is to buy a combination of 2-3 stones of the same brand and go from there.
To take off the fine scratches and burrs left by coarser stones, and to polish the surface, you can use stones starting at around 2000 grit. There is theoretically no upper limit, but stones above about 10000 grit achieve practically no measurable improvement in the edge. It is also interesting to note that above 8000 grit, there is no Japanese measurement standard. For stones labelled as having a finer grit, you simply have to take the manufacturer's word for it.
Cutlery is essential to the operation of every commercial kitchen, so it is important to know the best techniques for kitchen knife handling and safety. Proper knife training can help minimize the risk of personal injury and keep your kitchen running smoothly. If you are just beginning to learn or simply need to brush up on your approach, keep reading for some helpful knife safety tips. 1. A Sharp Knife Is a Safer Knife When you use a dull knife to cut, you need to apply more force. As a result, the knife is more likely to slip and increases the risk of injury. Keeping your knives sharpened is one of the easiest ways to keep them safe. Simply use a sharpening stone or knife sharpener to maintain the original precision of the blade. If your
All stones require either water or oil as a lubricant to sharpen the knife. We prefer water stones because they’re easier to use, less messy and don’t have the possibility to go rancid like oil does. If you choose a water stone, all you have to do is either add water to the stone before placing the knife on the surface, or soak the stone in water for 10 minutes before use. You’ll want to read the instruction for the stone you purchase to find out how to use it properly.
You want sharpening stones that will be useful for the majority of your edges now, and that will remain useful as you expand both your tools and your sharpening toolkit in the future. Ending up with duplicate stones or ones that are no longer useful as you gain new knives or tools is a waste of money. The goal is to start with something that will stay with you as your needs develop.

For instance, American Novaculite (aka Washita and Arkansas Stones) is a form of metamorphic Chert that produces some of the best known and best loved natural whetstones in existence. Then, there is a form of Belgian Coticule which has been known for providing extra-keen edges since Roman times and, there is a Japanese Siliciclastic sedimentary stone (aka Japanese Water Stones) which consist of a fine silicate particles suspended in a clay matrix. Plus, there are also various types of man-made whetstones available such as Silicon Carbide (aka Crystalon) stones and Aluminum Oxide (aka India Stones) as well as a synthetic Corundum (aka Ruby) rod and Aluminum Oxide impregnated ceramic rods as well as several different types of diamond hones.
Sharpening stones have been around since the dawn of civilization for a very good reason: they work. Yes, they’re more labor intensive than most electric sharpeners but they also allow you an unprecedented level of control. Once you get used to something like the Fallkniven DC3 Diamond/Ceramic Whetstone Sharpener you may never take out your electric sharpener again.
The most important aspect of a sharpening stone is the grit. If you have knives that have taken a beating and are either nicked up or really dull, you’ll need a courser stone to get it back into shape. And in order to put an exceptionally sharp edge on an already sharp knife, you’ll need a finer grit stone. If your knives are already in pretty good shape and just need a touch up, buying just a finer grit stone might be enough, but don’t think you can get away without a courser stone for knives that need more TLC. It is possible to buy a combination, or two-sided sharpening stone.
Lubricate the stone. Some stones specifically use oil or water, and if that's the case, ensure you're using the recommended lubricant. Most importantly, whichever lubricant you choose, do not change it after the first use. When using oils, only use those approved for sharpening stones. Food oils such as vegetable and olive oil should never be applied! Some options like diamond stones, and others, don't need any lubricant at all, so be sure to check the stone's instructions.
DMT® is recognized as the worldwide leader in diamond knife sharpeners and sharpening products, with a diverse product line and reputation for quality and innovation. DMT’s patented and award-winning products are known for their superior quality and versatility, are easy to use, and allow for sharpening in a fraction of the time required by other methods. DMT manufactures a full line of diamond knife sharpeners and other sharpening tools for use in woodworking, culinary arts, gardening, camping, fishing, hunting, outdoor and winter sports, industrial applications and more.
Medium Grit Stones: The number range here is from 1000 to 3000, with the latter being the basic, go-to sharpening stone. If your knives have lost their edge and need a good sharpen, then this is the grit you should start with. Don’t use it too often or the knife wears down rapidly. If you like to sharpen regularly, then the 2000 and 3000 grit are the ideal choice as they are less coarse, but please remember they are designed for sharpening and not maintaining the edge.
You've acquired a good chef's knife, you're using it almost daily to make tasty dinners for the family, and it's stored in a nice knife rack or a magnet for safekeeping. So why stop there? Keeping that knife's edge fine will make cooking not only safer but, let's face it, much more fun. Whether you've spent £150 on a high-end knife or under a tenner on a dinky paring knife, keeping it sharp is crucial. 
"Sharpening is like a hangover cure," says Laurie Timpson, founder of Savernake Knives in Wiltshire. "If there was a cure and you knew about it, I'd stay at your house, crash on your sofa and have whatever it was when I woke up. Everyone would have it and there'd be no discussion. Everybody says they've created a perfect sharpening technique, and they haven't." 

Now you may wonder, if a finer stone produces a better cutting edge why do I need a coarse stone at all? The answer is that finer stones work much more slowly than coarse ones. The amount of metal a fine stone removes with each pass is much less than what a coarse stone removes. If you have an edge with a good shape to it from a coarse stone, this is not a problem because the fine stone doesn’t have to remove much metal to improve the edge. If the edge is dull, it will take many times longer to reshape it with a fine stone than it would with a coarse one.
Once the burr is removed, it's time to test the sharpness with paper. Hold a piece of newspaper at about 45°, with a bit of tension, and slash lightly with each point of the blade. If it cuts through easily, your knife's sharp. Warner speedily lacerated his newspaper, but I of course struggled. There is an element of technique involved, he reassured me. 
Before you start sharpening, soak the stone in water for around five to 10 minutes, until it absorbs the water and a liquid film appears on the surface. After soaking, splash some water on top, and re-splash during the process if it ever gets too dry. You'll get a dark, splotch of steel and stone building up on the stone while you're sharpening the blade. This is totally normal so just splash the stone with some water to clean it off and allow it to perform more efficiently. 

The stone – With a sharpening stone, the process is essentially the same as with the stick sharpener. The only difference is that you don’t hold the stone, you place it into its own holder (If it comes with one. If it doesn’t you’ll need to improvise) on a flat surface. Push the knife down the stone several times while holding it at a shallow angle and then flip it and pull it toward you several times to get the other side of the blade.

When the stone is intended for use on a flat surface, it is called a Bench Stone. On the other hand, small, portable, hand-held stones are referred to as Pocket Stones. Also, because Pocket Stones are smaller than Bench Stones, they are more easily transported but, they also present difficulty in maintaining a consistent angle and even pressure when attempting to sharpen longer blades. Consequently, Bench Stones are commonly used at home or in camp whereas, Pocket Stones are generally reserved for honing an edge in the field.
This is a good size stone and has the two different grits needed for knife sharpening. No instructions were included, but there are many websites with written and video instructions, so this is not an issue for most people. A fair amount of dust is generated during the sharpening process, so protect the work surface and wash the knife after sharpening is completed.
At age 10, Terada learned the basics of sushi from his father and then went on to attend RKC Chef's School in Kochi, Japan from 1987-1989. He soon earned a nickname for his fast knife, attention to detail, divine presentation and ability to create new dishes and accents based on traditional Japanese cuisine. After graduating RKC Chef School, he was called to serve under Master Chef Kondo at Yuzuan restaurant in Kochi, Japan from 1989-1992. Mr. Kondo is the master of Kansai style cooking, considered to be the high-end of Japanese cuisine. Terada earned the title Master Sushi Chef by becoming the standing head sushi chef & can serve Fugu (Japan Licensed) to the public.
I recommend it as a lightweight alternative to larger stone for smaller knives. Leather necklace is comfortable and seems strong. I conditioned it for suppleness and swim with it on tightened as a choker. Stone is small, dog-tag size. I use it with water. Functional for small folder knives and multi-tools. Not useful for large fixed blades, since you can't make a long stroke. Small to grip. I use double-sided tape on one side to keep it in place on a flat rock. Not sure of grit, seems like around 1000. It took a while, but i got my old boy scout knife sharp.