grinding stones
Sharpening stones for kitchen knives
A sharpening stone lets you restore the edge bevel, sharpen an ordinarily dull knife, refine marks left by a coarser stone and create a very fine finish. The choice mainly depends on the condition of the knife, the stone grit, the abrasive material and the method of use recommended by the manufacturer.
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Which sharpening stone do you need?
Choose the grit according to the current condition of the edge. The lower the number, the faster the material removal. A higher number means a finer surface and smoother finish.
Where should a typical household start?
For regular maintenance of an undamaged kitchen knife, a stone around #1000 is a practical starting point. To refine the edge after sharpening, consider a #1000/#3000 combination. Use coarser stones mainly for repairs and very dull knives.
Sharpening stone grit overview
| Approximate grit | Main use | Who it is suitable for | What to watch out for |
|---|---|---|---|
| #120–#400 | Repairing damage, a very dull edge and greater material removal | Advanced users and repairs | The stone removes material quickly and can easily alter blade geometry |
| #600–#1000 | Basic sharpening and restoring a normally dull edge | Home kitchens and regular maintenance | A finer stone may follow depending on the desired result |
| #2000–#3000 | Fine sharpening and smoothing marks left by the basic stone | Home cooks and food-service operations | Not intended for quickly repairing a very dull or damaged edge |
| #4000–#6000 | Final sharpening and a refined cutting feel | Quality kitchen and Japanese knives | An excessively fine finish may not be ideal for every cutting task |
| #8000 and above | Polishing the bevel and very fine finishing | Experienced users and precision work | Without a correctly formed edge on the previous stones, it will not deliver the expected result |
Notice: The stated grits are approximate. Values from different standards and manufacturers may not be directly comparable. Always follow the marking and recommendations for the specific stone.
Types of sharpening stones
Single stone, combination stone or a complete set?
Single stone
Suitable when you know exactly which grit you need or are gradually building your own sharpening setup. It offers the full working surface in one grit.
Combination stone
Two grits in one product save space and can cover basic sharpening and subsequent refinement. Use each side for its intended purpose.
Sharpening stone set
Practical for users who want several consecutive grits, or also a holder, flattening tool and other accessories. Always check the exact contents of the specific set.
How do you use a sharpening stone?
Caring for a sharpening stone
Check flatness.
A hollow in the working surface makes it harder to maintain correct edge geometry. Flatten the stone with a suitable tool as needed.
Clean it according to the manufacturer’s instructions.
After sharpening, remove slurry and metal particles using a method suitable for the specific material.
Allow the stone to dry correctly.
If required by the manufacturer, let it dry naturally and evenly away from direct heat.
Protect it from impacts and frost.
Sharpening stones can be fragile. Do not expose wet stones to frost or store them in a way that prevents safe drying.
Sharpening safety
The stone must rest securely on a flat work surface. Keep your fingers above the level of the edge and make slow, controlled movements. If the stone or mat moves, stop sharpening and secure it.
Do not test sharpness by running your finger along the edge. Use a safe paper or food test and guide the blade away from your body.
We will advise you according to the knife and edge condition
Prepare the steel designation or a link to the knife, information about the edge condition and your sharpening experience. We will help you choose a suitable stone type and consecutive grits.
+420 702 049 048 Mon–Fri, 7:30–16:00FAQ: knife sharpening stones
Which sharpening stone should I choose first?
For a normally dull, undamaged kitchen knife, a stone around #1000 is a practical starting point. For subsequent refinement, you can add a grit around #3000.
Is a single or combination stone better?
A combination stone offers two grits and saves space. A single stone provides the full working surface in one grit and is better suited to a gradually assembled sharpening kit.
Does a sharpening stone need to be soaked before use?
Not every stone does. Some require soaking, others only moistening, while some are used dry. Always follow the instructions for the specific product.
Which grit should be used for a damaged edge?
Coarser stones, often roughly #120 to #400, are used for repairs. Because they remove material quickly, they require experience and careful control.
Do I need a #6000 or #8000 stone?
It is not always necessary for normal household sharpness. Fine stones are mainly used for final sharpening or polishing an already correctly formed edge.
What is the difference between a synthetic and natural stone?
Synthetic stones usually offer more predictable grit and a wider selection. Natural stones have individual properties and may require more experience.
When should I choose a diamond sharpening stone?
Diamond abrasive is suitable for efficient material removal and more wear-resistant steels. Because it works quickly, use controlled pressure.
How often does a stone need flattening?
It depends on the hardness of the stone, frequency of use and sharpening technique. Check flatness regularly and flatten the stone as soon as a hollow develops.
Can I sharpen every knife on the same stone?
Not always. Suitability depends on the steel, hardness, edge geometry and stone grit. Single-bevel grinds and very hard or thin blades require special attention.
How should a sharpening stone be stored?
After use, clean it and allow it to dry as recommended by the manufacturer. Protect it from impacts, direct heat and frost.
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Synthetic grinding stones
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Synthetic with the addition of natural materials
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Natural grinding stones
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Diamond grinding stones
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Grinding accessories
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zrnitost #120-#400
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brusné kameny - zrnitost #600 - #1000
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brusné kameny - zrnitost #2000 - #3000
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brusné kameny - zrnitost #4000 - #6000
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brusné kameny - zrnitost #8000 a více
Product sorting
List of products
Dellinger knife sharpening kit with combined sharpening stone with a very fast sharpening and polishing effect, bamboo base and guide for easier angle maintenance during...
Shapton Kuromaku JIS 1000 Sharpening Stone is a high-quality Japanese stone designed for regular maintenance and sharpening of kitchen knives. You can recognize the K0702 model...
This practical non-slip mat for use under a whetstone protects your countertop from water, grinding slurry, and scratches. The raised edge and drainage grooves help keep water...
KING HOME sharpening stone set. Includes Japanese‑standard stones #220, #1000 and #4000 for basic edge repair, sharpening, and final polishing. This set is suitable for advanced...
RISAM RW009 Knife Sharpening Guide is a practical tool for manual sharpening on water stones or diamond sharpeners. It helps maintain a stable angle of approximately 15°, making...
Combination grinding stone Risam with very fast grinding and polishing effect. The stone is made of synthetic Corundum (aluminium oxide). The grinding stone is supplied with a...
The RISAM sharpening angle guide is a practical tool for sharpening knives that makes it easy to maintain the correct angle. It supports sharpening at angles of 14°, 17°, and...
The Japanese KING G-45 #220 coarse whetstone from the HOME STONE “HT” series with a stable base – ideal for repairing blunt or damaged blades. Fast stock removal, easy to use,...
RISAM RW011 Ceramic Leveling Block is a practical tool for regularly leveling water-grinding stones. Its JIS #180 grit helps quickly remove unevenness, indentations, and worn...
Japanese Whetstone from the colour-coded SHAPTON Kuromaku series. Each colour represents a different grit according to the Japanese JIS standard. The practical plastic case...
Large combination grinding stone RISAM with very fast grinding and polishing effect. The stone is made of synthetic Corundum (aluminium oxide). The grinding stone is supplied...
Combined large RISAM grinding stone with very fast grinding and polishing effect. The stone is made of synthetic Corundum (aluminium oxide). The grinding stone is supplied with...
Adjustable RISAM grinding stone holder, suitable for multiple stone sizes thanks to movable foot with stop. Use the guide screws to adjust the desired stone size. Non-slip...
Diamond Double-Sided Sharpening Stone from Taidea. Two sharpening surfaces for major repairs and fine honing. The base is made from durable plastic with a non-slip bottom, and...
Diamond sharpening stone on an aluminum base from Risam. Sharpening surface for fine sharpening and polishing of blades. Aluminum base with a non-slip bottom. Plastic case for...
Diamond grinding stone on an aluminum base from Risam. Grinding surface for minor repairs and fine grinding. Aluminum base with a non-slip bottom. Plastic case for safe storage....
RISAM ADVANCED sharpening stone set. Includes RISAM stones #800, #1500, #3000 made according to Japanese standards for basic edge repair, fine sharpening, and final polishing +...
Fine-grained Japanese whetstone King S-3 #6000 from the King Deluxe series with a stable base – ideal for final polishing and ultra-fine sharpening. Fast stock removal, easy to...
The Japanese medium-grit King PART 2 #800 sharpening stone from the Deluxe series is ideal for restoring the edge and preparing for final sharpening. Fast stock removal, easy to...
Japanese fine-grained sharpening stone King S-45B #4000 from the HOME STONE “HT” series with a stable base – ideal for final honing of the blade and achieving a high level of...
The Japanese medium-grit KING K-45B #1000 whetstone from the HOME STONE “HT” series with a stable base – ideal for regular edge maintenance. Fast stock removal, easy to use,...
Coarse sponge for rust and dirt - ideal for blades, utensils or tools. It also removes paint and dirt. Effective and gentle at the same time.
