Choosing the best diamond sharpening stone comes down to quality, price and how you plan to use it. We compared the most popular and best-reviewed options on Amazon so you can decide quickly.
Below you will find our top picks with ratings, review counts, pros and cons. You may also like our guides to Best Sharpening Stone and Best Whetstone.
Top 3 Best Diamond Sharpening Stone at a Glance
SHARPAL 162N Double-sided Diamond Sharpening Stone, 8 in. x 3 in.
SHARPAL 156N Double-sided Diamond Sharpening Stone, 6 in. x 2.5 in.
Diamond Sharpening Stone 2 Side Grit 400/1000 Diamond Plate Honing Stone 8-inch Hone SharpenerBest Diamond Sharpening Stone
| Image | Product | Key Specs | Rating | Price |
|---|---|---|---|---|
| 1. SHARPAL 162N Double-sided Diamond Sharpening Stone, 8 in. x 3 in. Best Overall | Industrial monocrystalline diamonds are · Coarse 325 grit (45 micron) for quick edge | 4.8/5 4,085 reviews | Check Price |
| 2. SHARPAL 156N Double-sided Diamond Sharpening Stone, 6 in. x 2.5 in. Highest Rated | Industrial monocrystalline diamonds are · Coarse 325 grit (45 micron) for quick edge | 4.7/5 3,104 reviews | Check Price |
| 3. Diamond Sharpening Stone 2 Side Grit 400/1000 Diamond Plate Honing Stone 8-inch Hone Sharpener Best Budget | Convenience & Durability:Diamond sharpening · Double-sided Grit Design:Easily tackle both | 4.6/5 2,243 reviews | Check Price |
 | 4. Knife Sharpener Tool, Rolling Knife Sharpener Kit, Knife Sharpening with Diamonds and Ceramic Runner-Up | Accurate and Long-Lasting SharpnessAny · Diamond and Ceramic DiscsAIERLIAN rolling | 4.4/5 2,211 reviews | Check Price |
 | 5. DMT Deluxe Diamond Professional Knife Sharpening Kit – Includes Set of 3 Diamond Whetstone Best Premium | Trusted by pros for precise, consistent, and · Establish proper angle of bevel, 20 degrees | 4.5/5 1,780 reviews | Check Price |
 | 6. Diamond Machining Technology (DMT) Dia-Sharp Diamond Sharpening Stone Credit Card, Extra Fine Best Alternative | Designed to fit easily into any pocket or · Coarse diamond stone (45 micron / 325 mesh) | 4.6/5 1,237 reviews | Check Price |
 | 7. DMT D8F Dia-Sharp Bench Stone – Diamond Knife Sharpener for the Workshop, Jobsite or Kitchen Solid Choice | This knife sharpener uses a continuous fine · Designed for various edges, this diamond | 4.5/5 1,143 reviews | Check Price |
1. SHARPAL 162N Double-sided Diamond Sharpening Stone, 8 in. x 3 in. – Best Overall
SHARPAL 162N Double-sided Diamond Sharpening Stone, 8 in. x 3 in.
Amazon rating: 4.8/5 from 4,085 reviews
Pros
Cons
SHARPAL is our best overall pick among the best diamond sharpening stone options. It has a 4.8 star rating from 4,085 reviews and is priced around $69.99.
Industrial monocrystalline diamonds are electroplated onto a stainless steel base of 0.35 inch thickness.
Key features
Coarse 325 grit (45 micron) for quick edge setting; Extra fine 1200 grit (12 micron) for honing.
SHARPAL exclusive MirrorFlat technology guarantees long-lasting even contact with knives or tools, while oil stone and water stone easily wear down with uneven surface.
Includes storage box with non-slip rubber pad that can be used as a stone base while sharpening; With Sharpening Angle Guide integrated with 4 universal angles-14°, 17°, 20°, 25° and instruction manual inside of.
What it’s like to own
The review count may be shared across variants of this listing, so treat it as a general sign of popularity rather than a score for one exact option.
Check the product page for the current size, pack and color options before you order, since listings can change.
Best for: Shoppers looking for the overall option among diamond sharpening stone picks.
May not fit: Anyone who needs a different size, pack or style than this listing offers.
2. SHARPAL 156N Double-sided Diamond Sharpening Stone, 6 in. x 2.5 in. – Highest Rated
SHARPAL 156N Double-sided Diamond Sharpening Stone, 6 in. x 2.5 in.
Amazon rating: 4.7/5 from 3,104 reviews
Pros
Cons
SHARPAL is our highest rated pick among the best diamond sharpening stone options. It has a 4.7 star rating from 3,104 reviews and is priced around $44.99.
Industrial monocrystalline diamonds are electroplated onto a stainless steel base of 0.33 inch thickness.
Key features
Coarse 325 grit (45 micron) for quick edge setting; Extra fine 1200 grit (12 micron) for honing.
SHARPAL exclusive MirrorFlat technology guarantees long-lasting even contact with knives or tools, while oil stone and water stone easily wear down with uneven surface.
Includes storage box with non-slip rubber pad that can be used as a stone base while sharpening; With Sharpening Angle Guide integrated with 4 universal angles-14, 17, 20, 25 and instruction manual inside of packaging.
What it’s like to own
The review count may be shared across variants of this listing, so treat it as a general sign of popularity rather than a score for one exact option.
Check the product page for the current size, pack and color options before you order, since listings can change.
Best for: Shoppers looking for the highest rated option among diamond sharpening stone picks.
May not fit: Anyone who needs a different size, pack or style than this listing offers.
3. Diamond Sharpening Stone 2 Side Grit 400/1000 Diamond Plate Honing Stone 8-inch Hone Sharpener – Best Budget
Diamond Sharpening Stone 2 Side Grit 400/1000 Diamond Plate Honing Stone 8-inch Hone Sharpener White
Amazon rating: 4.6/5 from 2,243 reviews
Pros
Cons
S SATC is our best budget pick among the best diamond sharpening stone options. It has a 4.6 star rating from 2,243 reviews and is priced around $21.99.
Convenience & Durability:Diamond sharpening plates are far more durable and easily to maintain than whetstones because they won’t be cratered and do not need to be flattened.
Key features
Double-sided Grit Design:Easily tackle both coarse and fine sharpening jobs with just one sharpening stone.
Cutting-edge technology:Steel plates are precisely machined and electroplated with monocrystalline diamonds, which gives them a far longer lifespan than its counterparts.
Precision & quality control:We keep our quality control standard high only to offer our customers the fastest and smoothest sharpening experience.
What it’s like to own
The review count may be shared across variants of this listing, so treat it as a general sign of popularity rather than a score for one exact option.
Check the product page for the current size, pack and color options before you order, since listings can change.
Best for: Shoppers looking for the budget option among diamond sharpening stone picks.
May not fit: Anyone who needs a different size, pack or style than this listing offers.
4. Knife Sharpener Tool, Rolling Knife Sharpener Kit, Knife Sharpening with Diamonds and Ceramic – Runner-Up
Amazon rating: 4.4/5 from 2,211 reviews
Pros
Cons
AIERLIAN is our runner-up pick among the best diamond sharpening stone options. It has a 4.4 star rating from 2,211 reviews and is priced around $39.99.
Accurate and Long-Lasting SharpnessAny serious chef knows that high-quality knives are expensive.
Key features
Diamond and Ceramic DiscsAIERLIAN rolling sharpener are equipped with #400 diamond and #3000 ceramic discs.
Multi Angle Magnetic SupportThe kitchen knife sharpener always maintains a constant grinding angle, which is a key factor in sharpening knives.
Premium Wood & Strong Magnets Each product is made of High-grade natural wood.
What it’s like to own
The review count may be shared across variants of this listing, so treat it as a general sign of popularity rather than a score for one exact option.
Check the product page for the current size, pack and color options before you order, since listings can change.
Best for: Shoppers looking for the runner-up option among diamond sharpening stone picks.
May not fit: Anyone who needs a different size, pack or style than this listing offers.
5. DMT Deluxe Diamond Professional Knife Sharpening Kit – Includes Set of 3 Diamond Whetstone – Best Premium
Amazon rating: 4.5/5 from 1,780 reviews
Pros
Cons
DMT (Diamond Machining Technology) is our best premium pick among the best diamond sharpening stone options. It has a 4.5 star rating from 1,780 reviews and is priced around $105.40.
Trusted by pros for precise, consistent, and long-lasting sharpening; DMT sharpeners use micronized monocrystalline diamonds precisely sized for a more uniform diamond surface.
Key features
Establish proper angle of bevel, 20 degrees for most edges; lightly stroke away from the body, drawing the knife forward and across the sharpening surface; progress to finer grits until desired result.
Blue Coarse diamond stone (45 micron / 325 mesh) restores neglected edges; Red Fine diamond (25 micron / 600 mesh) hones edges; Green Extra-fine diamond (9 micron / 1200 mesh) polishes and refines edges.
Trusted by pros, the DMT diamond sharpening stone set restores even the dullest edges to razor-sharp precision; housed in an elegant wood box; beautifully crafted for long-lasting use.
What it’s like to own
The review count may be shared across variants of this listing, so treat it as a general sign of popularity rather than a score for one exact option.
Check the product page for the current size, pack and color options before you order, since listings can change.
Best for: Shoppers looking for the premium option among diamond sharpening stone picks.
May not fit: Anyone who needs a different size, pack or style than this listing offers.
6. Diamond Machining Technology (DMT) Dia-Sharp Diamond Sharpening Stone Credit Card, Extra Fine – Best Alternative
Amazon rating: 4.6/5 from 1,237 reviews
Pros
Cons
DMT (Diamond Machining Technology) is our best alternative pick among the best diamond sharpening stone options. It has a 4.6 star rating from 1,237 reviews and is priced around $24.39.
Designed to fit easily into any pocket or wallet, each lightweight diamond stone also comes in a convenient, grit color-coded vinyl carry case.
Key features
Coarse diamond stone (45 micron / 325 mesh) restores neglected edges; Fine diamond stone (25 micron / 600 mesh) hones edges; Extra-fine diamond stone (9 micron / 1200 mesh) polishes and refines edges.
Each diamond stone sharpener is conveniently sized at 3.25 x 2 x 0.05 inches, meaning you can take your sharpening anywhere.
Micronized monocrystalline diamond surface sharpens edges faster and easier than conventional sharpening stones; No messy oils are needed either — sharpen lapping plate dry or with water.
What it’s like to own
The review count may be shared across variants of this listing, so treat it as a general sign of popularity rather than a score for one exact option.
Check the product page for the current size, pack and color options before you order, since listings can change.
Best for: Shoppers looking for the alternative option among diamond sharpening stone picks.
May not fit: Anyone who needs a different size, pack or style than this listing offers.
7. DMT D8F Dia-Sharp Bench Stone – Diamond Knife Sharpener for the Workshop, Jobsite or Kitchen – Solid Choice
Amazon rating: 4.5/5 from 1,143 reviews
Pros
Cons
DMT (Diamond Machining Technology) is our solid choice pick among the best diamond sharpening stone options. It has a 4.5 star rating from 1,143 reviews and is priced around $65.29.
This knife sharpener uses a continuous fine diamond sharpening stone to repair dull and damaged edges.
Key features
Designed for various edges, this diamond bench stone works well with large blades and fine-pointed tools.
The DMT diamond sharpening stone features 4 non-skid rubber feet for stability.
Proudly made in the USA, the DMT Dia-Sharp diamond knife sharpener offers superior quality, trusted by professionals.
What it’s like to own
The review count may be shared across variants of this listing, so treat it as a general sign of popularity rather than a score for one exact option.
Check the product page for the current size, pack and color options before you order, since listings can change.
Best for: Shoppers looking for the solid choice option among diamond sharpening stone picks.
May not fit: Anyone who needs a different size, pack or style than this listing offers.
How to Choose the Best Diamond Sharpening Stone
What matters most in a diamond sharpening stone
Start with the materials, size and build quality, since these decide how well a diamond sharpening stone performs and how long it lasts. Compare the specifications in each listing side by side.
Pay attention to the handle, grip or design details that affect comfort and safety in everyday use.
Price versus value
A higher price does not always mean better performance. Compare ratings and review counts, and favor products with consistent feedback from many buyers.
Budget options are a good way to start, while premium picks may offer better materials or longer warranties.
Care and maintenance
Check whether the product is dishwasher safe or needs hand washing, and store it so it stays protected. Good care extends the life of any kitchen tool.
Follow the manufacturer instructions for cleaning and use.
FAQ
How do I choose the best diamond sharpening stone?
Compare ratings, review counts, size and materials, then match them to how you cook. The picks above are a good starting point for most kitchens.
Is a more expensive diamond sharpening stone worth it?
Sometimes. Premium options can offer better materials and durability, but many budget picks perform well for everyday use.
How should I clean and store a diamond sharpening stone?
Follow the care instructions in the listing, since some products are dishwasher safe and others need hand washing. Store it dry and protected.
Where can I buy these products?
All the picks above link to Amazon, where you can check current prices, options and recent reviews.
Final Verdict
SHARPAL 162N Double-sided Diamond Sharpening Stone, 8 in. x is our top pick for its strong ratings and large review base. For a lower price, Diamond Sharpening Stone 2 Side Grit 400/1000 Diamond Plate is the best budget option. SHARPAL 156N Double-sided Diamond Sharpening Stone, 6 in. x has the highest rating on this list.
DMT Deluxe Diamond Professional Knife Sharpening Kit is the premium pick for buyers who want to spend more. Check the current price and options on Amazon before you buy, since listings change often.
Quick picks:
- Best Overall: SHARPAL 162N Double-sided Diamond Sharpening Stone, 8 in. x
- Highest Rated: SHARPAL 156N Double-sided Diamond Sharpening Stone, 6 in. x
- Best Budget: Diamond Sharpening Stone 2 Side Grit 400/1000 Diamond Plate
- Runner-Up: Knife Sharpener Tool, Rolling Knife Sharpener Kit, Knife
- Best Premium: DMT Deluxe Diamond Professional Knife Sharpening Kit
Related buying guides: Best Sharpening Stone · Best Whetstone · Best Manual Knife Sharpener · Best Electric Knife Sharpener
