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10 Best Diamond Sharpening Stones 2025 in the United States
#1
Winner
SHARPAL 162N Double-sided Diamond Sharpening Stone Whetstone Knife Sharpener |Coarse 325 / Extra Fine 1200 Grit | Storage Case with NonSlip Base & Angle Guide (8 in. x 3 in.)
The SHARPAL 162N Double-sided Diamond Sharpening Stone is an excellent choice for anyone looking to maintain a variety of cutting tools efficiently. With its dual grit feature, it offers a coarse 325 grit for quick sharpening and an extra fine 1200 grit for honing, which is suitable for hard materials like high-speed steel and ceramics. This product shines with its use of industrial monocrystalline diamonds, ensuring durability and fast sharpening—up to five times quicker than traditional oil or water stones. Its ability to work without messy lubricants simplifies the sharpening process.
Rating
10.0
Chosen by1,117
Grit Size
Stone Size
Base Material
Most important from
3341 reviews
#2
SHARPAL 156N Double-sided Diamond Sharpening Stone Whetstone Knife Sharpener | Coarse 325 / Extra Fine 1200 Grit | Storage Case with NonSlip Base & Angle Guide (6 in. x 2.5 in.)
The SHARPAL 156N Double-sided Diamond Sharpening Stone is a solid choice for those looking to maintain the sharpness of their knives and tools. Its dual grit feature offers a coarse 325 grit for quick edge setting and an extra fine 1200 grit for honing, making it versatile for different sharpening needs. This is particularly beneficial for users who work with hard materials such as high-speed steel and ceramics, as it can sharpen them efficiently without needing messy oils or water. The industrial monocrystalline diamonds ensure durability and a faster sharpening experience—reportedly up to five times quicker than traditional stones.
Rating
7.9
Grit Size
Monocrystalline vs. Polycrystalline Diamonds
Most important from
2842 reviews
#3
SHARPAL 168H Large 8" x 3" Dual-Grit Diamond Sharpening Stone – Coarse 325 & Extra-Fine 1000 Grit Monocrystalline Diamond Whetstone, Professional Knife Sharpener with Anti-Slip Pad and Angle Guide
The SHARPAL 168H diamond sharpening stone offers a practical and effective solution for maintaining knives and various edged tools. Its dual grit design—coarse 325 grit and extra-fine 1000 grit—covers both restoring dull edges and honing a sharp finish, making it versatile for different sharpening stages. At 8 inches by 3 inches, the large stone provides a stable surface and better control, which is especially helpful if you’re sharpening bigger knives or tools like chisels and axes.
Rating
7.6
Grit Size
Monocrystalline vs. Polycrystalline Diamonds
Base Material
Most important from
273 reviews
Top 10 Best Diamond Sharpening Stones 2025 in the United States
#1
Winner
SHARPAL 162N Double-sided Diamond Sharpening Stone Whetstone Knife Sharpener |Coarse 325 / Extra Fine 1200 Grit | Storage Case with NonSlip Base & Angle Guide (8 in. x 3 in.)
SHARPAL 162N Double-sided Diamond Sharpening Stone Whetstone Knife Sharpener |Coarse 325 / Extra Fine 1200 Grit | Storage Case with NonSlip Base & Angle Guide (8 in. x 3 in.)
Grit Size: 325 coarse, 1200 extra fine
Stone Size: 8.46"L x 3.94"W x 1.93"H
Monocrystalline vs. Polycrystalline Diamonds: Monocrystalline
Chosen by 1117 this week
SHARPAL 156N Double-sided Diamond Sharpening Stone Whetstone Knife Sharpener | Coarse 325 / Extra Fine 1200 Grit | Storage Case with NonSlip Base & Angle Guide (6 in. x 2.5 in.)
SHARPAL 156N Double-sided Diamond Sharpening Stone Whetstone Knife Sharpener | Coarse 325 / Extra Fine 1200 Grit | Storage Case with NonSlip Base & Angle Guide (6 in. x 2.5 in.)
Grit Size: 325 coarse, 1200 extra fine
Stone Size: 6-inch by 2.5-inch
Monocrystalline vs. Polycrystalline Diamonds: Monocrystalline
Base Material: Storage case as non-slip base
SHARPAL 168H Large 8" x 3" Dual-Grit Diamond Sharpening Stone – Coarse 325 & Extra-Fine 1000 Grit Monocrystalline Diamond Whetstone, Professional Knife Sharpener with Anti-Slip Pad and Angle Guide
SHARPAL 168H Large 8" x 3" Dual-Grit Diamond Sharpening Stone – Coarse 325 & Extra-Fine 1000 Grit Monocrystalline Diamond Whetstone, Professional Knife Sharpener with Anti-Slip Pad and Angle Guide
Grit Size: coarse 325 and extra-fine 1000 grit
Stone Size: 8 by 3 inches
Monocrystalline vs. Polycrystalline Diamonds: Monocrystalline diamond
Bonding Material: advanced electroplating process
SHARPAL 169H Large 8" x 3" Dual-Grit Diamond Sharpening Stone – Extra-Coarse 220 & Fine 600 Grit Monocrystalline Diamond Whetstone, Professional Knife Sharpener with Anti-Slip Pad and Angle Guide
SHARPAL 169H Large 8" x 3" Dual-Grit Diamond Sharpening Stone – Extra-Coarse 220 & Fine 600 Grit Monocrystalline Diamond Whetstone, Professional Knife Sharpener with Anti-Slip Pad and Angle Guide
Grit Size: 220 extra-coarse / 600 fine
Stone Size: 8" x 3"
Monocrystalline vs. Polycrystalline Diamonds: Monocrystalline diamond
Bonding Material: Electroplating
Ultra Sharp Diamond Sharpening Stone Set - 8 x 3 Coarse/Medium/Extra Fine
Ultra Sharp Diamond Sharpening Stone Set - 8 x 3 Coarse/Medium/Extra Fine
Grit Size: 300, 600, 1200
Stone Size: 8 x 3 inches
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DMT D8E Dia-Sharp Diamond Knife Sharpener, Extra Fine Diamond Sharpening Stone, 8-Inch, White
DMT D8E Dia-Sharp Diamond Knife Sharpener, Extra Fine Diamond Sharpening Stone, 8-Inch, White
Grit Size: Extra Fine
Stone Size: 8-inch
Bonding Material: durable bonding
Base Material: durable base system
DMT W6EFC Deluxe Diamond Whetstone Knife Sharpening Kit with Wood Box, Set of 3 Sharpening Stones, 6" x 2"
DMT W6EFC Deluxe Diamond Whetstone Knife Sharpening Kit with Wood Box, Set of 3 Sharpening Stones, 6" x 2"
Grit Size: Coarse, Fine, Extra-fine
Stone Size: 6 by 2 by 0.75 inches
Monocrystalline vs. Polycrystalline Diamonds: Monocrystalline
Base Material: Wood
Lansky 4-Stone Deluxe Diamond System | Precision Knife Sharpening Kit
Lansky 4-Stone Deluxe Diamond System | Precision Knife Sharpening Kit
Grit Size: 70, 120, 280, 600
Monocrystalline vs. Polycrystalline Diamonds: Monocrystalline
Bonding Material: Plastic
Base Material: Plastic
Trend Essential Diamond Sharpening Kit with 300/1000 Grit Bench Stone, Lapping Fluid, Leather Strop, Honing Paste, Cleaning Block & Sharpening Solutions Guide, DWS/KIT/H
Trend Essential Diamond Sharpening Kit with 300/1000 Grit Bench Stone, Lapping Fluid, Leather Strop, Honing Paste, Cleaning Block & Sharpening Solutions Guide, DWS/KIT/H
Grit Size: 300/1000
Stone Size: 14"L x 14"W x 2.5"H
Monocrystalline vs. Polycrystalline Diamonds: Monocrystalline
Base Material: Carbide, Aluminum, Leather
#10
DMT D8C Dia-Sharp Bench Stone, Diamond Knife Sharpener, Coarse (325), Flat Sharpening, Non-Slip Knife Sharpener, Made in the USA, 8" x 3" x 0.38"
DMT D8C Dia-Sharp Bench Stone, Diamond Knife Sharpener, Coarse (325), Flat Sharpening, Non-Slip Knife Sharpener, Made in the USA, 8" x 3" x 0.38"
Grit Size: 45 micron/325 mesh
Stone Size: 8"L x 3"W x 0.38"H
Monocrystalline vs. Polycrystalline Diamonds: Monocrystalline
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Buying Guide for the Best Diamond Sharpening Stones
Choosing the right diamond sharpening stone can significantly impact the ease and effectiveness of your sharpening tasks. Diamond sharpening stones are known for their durability and ability to sharpen a wide range of tools and knives. To make an informed decision, it's important to understand the key specifications and how they align with your specific needs.Grit SizeGrit size refers to the coarseness or fineness of the diamond particles on the sharpening stone. This spec is crucial because it determines how much material will be removed from the blade and how fine the edge will be. Grit sizes are usually categorized into coarse (200-400 grit), medium (600-800 grit), and fine (1000 grit and above). Coarse grits are ideal for repairing damaged edges or reshaping blades, medium grits are suitable for general sharpening, and fine grits are used for honing and polishing the edge to a razor-sharp finish. Choose a grit size based on the condition of your tools and the level of sharpness you desire.
Stone SizeThe size of the diamond sharpening stone affects how comfortable and efficient it is to use. Larger stones provide a bigger surface area, making it easier to sharpen larger tools and knives. They also offer more stability during sharpening. Smaller stones are more portable and can be convenient for on-the-go sharpening or for smaller tools. Consider the types of tools you will be sharpening and whether you need a portable option when selecting the stone size.
Monocrystalline vs. Polycrystalline DiamondsDiamond sharpening stones can be made with either monocrystalline or polycrystalline diamonds. Monocrystalline diamonds are single-crystal diamonds that are more durable and wear-resistant, making them ideal for heavy-duty sharpening tasks. Polycrystalline diamonds consist of multiple crystal structures, which can break down more quickly but provide a faster cutting action. If you need a long-lasting stone for frequent use, monocrystalline diamonds are a better choice. For occasional use or faster sharpening, polycrystalline diamonds may be sufficient.
Bonding MaterialThe bonding material holds the diamond particles in place on the sharpening stone. Common bonding materials include nickel and resin. Nickel-bonded stones are more durable and can withstand heavy use, making them suitable for professional or industrial applications. Resin-bonded stones are typically less expensive and can provide a smoother sharpening experience, but they may wear out faster. Consider how often you will use the stone and the types of tools you will be sharpening when choosing the bonding material.
Base MaterialThe base material of the diamond sharpening stone affects its stability and ease of use. Common base materials include plastic, metal, and wood. A sturdy base material like metal or wood provides better stability during sharpening, reducing the risk of slipping and ensuring consistent results. Plastic bases are lighter and more portable but may not offer the same level of stability. Think about where you will be using the stone and whether you need a stable or portable option when selecting the base material.