diamond sharpening stones
Worth a lookShows low returns (0.6%), but soft demand (-18.5% this quarter) keeps it on the watch list.
Returns
Incredible0.6%return rate — above 5% kills the launch gate
Avg price
Incredible£24.83avg listing price — sweet spot $15–$100
Price range
Great£7.41–£115.22cheapest to priciest tracked listing — scored on the share inside $15–$100
Competition
Good44%top-5 click share — leaders hold, buyers still browse
Conversion
Good4.2%search→purchase rate — share of searches ending in a sale
Quality gap
Good4.5★avg incumbent rating — lower means beatable quality
Brand share
Okay83%top-5 brand share — brands hold most of the demand
Market size
Okay£122K£122K/yr · 118K searches
Review moat
Okay3,996.66avg incumbent reviews — the moat a new listing must climb
Growth
Bad-18.5%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United Kingdom niche tracking, diamond sharpening stones is a £122K/yr Amazon United Kingdom market (118K searches/yr). The top 5 brands hold 83% of demand. Demand peaks in Jan–Feb–Nov–Dec. Verdict: Worth a look — 50/100.
Data updated Jul 22, 2026 · scored weekly · How we score niches
diamond sharpening stones market data
- Units sold / yr
- 3K–4K
- avg 0–100/product
- Revenue / yr
- £74K–£99K
- units × avg price
- Conversion rate
- 4.2%
- Avg BSR
- #37
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 86%
- Out of stock
- 0.0%
- Avg brand age
- 61 months
- Avg seller age
- 181 days
Competition & brand share
The top 5 products take 44% of clicks — established leaders, but buyers still shop beyond them.Brands
14 falling
Sellers
45
Top-5 brand share
83%
Top 20: 100%
Top-5 click share
44%
Top 20: 83%
Open market
14%
- SHARPAL54%
- Yuejizhe10%
- Faithfull8%
- CWOVRS6%
- Aolso5%
- S SATC3%
- Open — no brand owns it (8 brands, 14%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -18.5% search growth over the last 90 days.Peak months: Jan, Feb, Nov, Dec · busiest ÷ quietest = 1.9×
Top diamond sharpening stones search terms
- diamond sharpening stones36K/yr
- sharpal17K/yr
- diamond sharpening plate12K/yr
- diamond sharpening stone9K/yr
- diamond stone8K/yr
- sharpal knife sharpener11K/yr
- dmt diamond sharpening stone7K/yr
- sharpal diamond sharpening stone6K/yr
- diamond stones for sharpening5K/yr
- diamond sharpening4K/yr
Top diamond sharpening stones products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
SHARPAL 156N Diamond Whetstone Knife Sharpener with Storage Base 2 Side Grit Coarse 325 / Extra Fine 1200 Diamond Sharpening Stone with Non-Slip Base and Angle Guide (152 x 63mm)
SHARPAL£34.614.7★3,008 rev
SHARPAL 162N Diamond Whetstone Knife Sharpener with Storage Base | 2 Side Grit Coarse 325 / Extra Fine 1200 | Diamond Sharpening Stone | Non-Slip Base & Angle Guide (203 x 76mm / 8 x 3 Inch)
SHARPAL£48.184.7★3,864 rev
6 Pcs Diamond Sharpening Plates 120# 200# 600# 1200# 2000# 3000# Diamond Sharpening from Extra Coarse to Extra Fine Grit for Various Tools
Yuejizhe£13.744.2★318 rev
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£30.804.6★485 rev
CWOVRS 5-Piece Diamond Sharpening Stones 200-2000# with Honeycomb Surface
CWOVRS£14.904.5★93 rev
Newest
by launch date
SANTUO 5Pcs Diamond Sharpening Stone Set with Non-Slip Mat
SANTUO£10.913 rev
SHARPAL 202H Precision Knife Sharpening System Adjustable 10-35 Angle
SHARPAL£115.22433 rev
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£31.11277 rev
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£30.80485 rev
Diamond Sharpening Stone Kit 3 Side Grit 400/1000/8000 Knife Sharpener for Sharp Blade Premium Diamond & Ceramic Whetstone with Angle Guide Non-Slip Base & Leather Strop
DOWOX£32.99294 rev
Trending
90-day click momentumSANTUO 5Pcs Diamond Sharpening Stone Set with Non-Slip Mat
SANTUO£10.915.0★
Diamond Sharpening Stone Kit 3 Side Grit 400/1000/8000 Knife Sharpener for Sharp Blade Premium Diamond & Ceramic Whetstone with Angle Guide Non-Slip Base & Leather Strop
DOWOX£32.994.5★
Aolso Diamond Sharpening Stones 6 PCS Sharpening Stone Set Kit Professional Whetstone for Kitchen Knives & Garden Knives Durable Sharpening Stone 150/240/600/1000/2000/3000 Grit
Aolso£8.744.3★
SHARPAL 121N Dual-Grit Diamond Sharpening Stone Tool Sharpener for Sharpening Knife Garden Shears Axe and All Blade Edge
SHARPAL£16.534.4★
Aolso Diamond Sharpening Stones Double-Sided Diamond Bench Stone Professional Whetstone with Non-Slip Base Suitable for Kitchen Knives & Garden Knives 400/1000 Grit
Aolso£8.964.2★
What buyers say about diamond sharpening stones
What buyers praise and complain about, mined from review topics.What buyers love
“they are now very sharp”
“Stone set is good quality”
“Best for the money”
“Ease of use”
“efficient this is”
“get the job done”
“it is very durable”
“Well designed and easy to use”
“The angle guides are handy for beginners”
“The size is also convenient”
What buyers complain about
“Let down by quality of the carrier”
“Not fit for purpose”
“there is no way to sharpen scissors”
“wore out after a week”
“leaning on the expensive side which is why I dropped a star for reduced value for money”
“Not robust enough”
“A pity as I thought something like this would be very handy”
“very awkward and next to no instructions”
“This means it's impossible to get a properly flat surface with them so they're useless for sharpening plane irons and chisels”
“Not on websites description”
Top return reasons
Common questions
- Is diamond sharpening stones profitable to sell on Amazon United Kingdom?
- The niche generates £122K/yr across 35 tracked products. 1 of 2 products launched in the last 360 days are still selling. 90-day search growth is -18.5%. Flapen's verdict: Worth a look (50/100).
- How competitive is the diamond sharpening stones niche?
- 14 brands and 45 sellers compete. The top 5 products take 44% of clicks and top 5 brands hold 83% of demand.
- What do buyers complain about in diamond sharpening stones?
- Top complaints mined from reviews: Quality-Overall, Size-Overall, Sharpness. The return rate is 0.6%.
- When does demand for diamond sharpening stones peak?
- Demand peaks in Jan–Feb–Nov–Dec; the busiest month runs 1.9× the quietest.
- What does it cost to enter the diamond sharpening stones niche?
- Listings span £7.41–£115.22; the average listing price is £24.83 (sweet spot $15–$100). The average incumbent carries 3,997 reviews — the moat a new listing must climb.