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Diamond Sharpening Stones

Diamond Sharpening Stones shows low returns (0.6%), but soft demand (-18.5% this quarter) keeps it on the watch list.

Flapen Score

50
Worth a look
Market size 28Growth 16Conversion 51Competition 68Returns 97Price range 78Avg price 95Brand share 36Review moat 25Quality gap 50
This niche Category average

Is Diamond Sharpening Stones profitable on Amazon?

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.

Diamond Sharpening Stones: the Amazon niche in one read

Everything a seller checks before entering, in three answers.

Is the demand real?

Worth a look. Search demand moved -18.5% over the last 90 days and 4.2% of searches end in a purchase.

£122K

revenue / yr

Units sold / yr4K
Search volume / yr-18.5%118K
Conversion rate4.2%
Avg price£24.83

Who owns the niche?

The top 5 brands hold 83% of demand, so 17% of the market is open.

17%

open market share

Brands · sellers14 · 45
Top-5 product click share44%
Open market17%
Avg brand age61 months

Is there a way in?

Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.5★ — the gap to enter on.

0/100

page quality · 35 products

Sponsored placement86%
New entrants (1y)2· 1 succeeded
Avg rating4.5★
Avg reviews3,997

Top Diamond Sharpening Stones products & what they sell for

Every tracked product — its share of the shelf, its review moat, and what it sells for.

Competition: brands, sellers & click share

The top 5 products take 44% of clicks — established leaders, but buyers still shop beyond them.

£0£5K£10K£15K£20K1101001K10K100K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

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%)

Diamond Sharpening Stones demand & seasonality

Weekly search volume, with the niche's key stats alongside.

Volume118KCVR4.2%Products35Brands14Top 5 Brands83%OOS Rate0.0%Rating4.5★Reviews3,997Avg BSR#37
4K3KSpike '24Holiday '24Spike '25Prime Day '25Black Friday '25Holiday '25SepDecMarJunAugNovMarMay

Peak months: Jan, Feb, Nov, Dec · busiest ÷ quietest = 1.9×

Top Diamond Sharpening Stones search terms shoppers use

The exact queries shoppers type, with yearly volume, growth and conversion.

  • 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

What reviews say buyers love and hate about Diamond Sharpening Stones

What buyers mention most, as a share of all reviews.

What buyers love

84% of reviews
Sharpness20%

they are now very sharp

Quality-Overall16%

Stone set is good quality

Value For Money15%

Best for the money

Ease Of Use15%

Ease of use

Efficiency5%

efficient this is

What buyers complain about

67% of reviews
Quality-Overall14%

Let down by quality of the carrier

Size-Overall11%

Not fit for purpose

Sharpness11%

there is no way to sharpen scissors

Durability8%

wore out after a week

Value For Money6%

leaning on the expensive side which is why I dropped a star for reduced value for money

Diamond Sharpening Stones return rate & reasons

Why buyers send it back, as a share of all return requests.

0.6%

Return rate

22%

Fixable by listing

The "fixable" share counts expectation-mismatch reasons — size, look, advertised-vs-actual — that better copy and images address.

1Sharpness
18%
2Size-Overall
14%
3Functionality-Overall
12%
4Quality-Overall
10%
5Value For Money
6%

Common Diamond Sharpening Stones questions

The questions sellers ask about this niche, answered from the tracked metrics.

Flapen scores Diamond Sharpening Stones 50/100 on Amazon United Kingdom — Worth a look. The niche generates £122K/yr across 35 tracked products. 1 of 2 products launched in the last 360 days are still selling. Search demand moved -18.5% over the last 90 days.
Search demand for Diamond Sharpening Stones on Amazon United Kingdom peaks in Jan–Feb–Nov–Dec, where the busiest month runs 1.9× the quietest.