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Rock Tumbler

Fail

The top 5 brands take 100% of clicks, so Rock Tumbler is a Fail.

Flapen Score
45
45 / 100
Ranks 4,022 of 5,777 Home & Garden niches · −6 vs the category median of 51
Market size
£101K/yr153K searches / yr
90-day growth
+33.2%search demand this quarter
Competition
70%top-5 click share · 5 brands · 13 sellers

Flapen Score

Rock Tumbler against its category

The dotted line is the Home & Garden average. Past it, Rock Tumbler is stronger. Inside it, weaker.

45Fail
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The Rock Tumbler market on Amazon at a glance

Shoppers on Amazon United Kingdom searched for Rock Tumbler 153K times last year and spent an estimated £101K. All 5 brands take every click. Demand peaks in Nov–Dec. Flapen scores it 45 out of 100, a Fail.

01 · Demand

An estimated 1.3% of those searches ended in a purchase.

Shoppers searched for this 153K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 1.3% of those searches ended in a purchase. Searches in the last 90 days moved +33.2% against the 90 days before. Searches, conversion and average price together put the market at an estimated £101K a year.

Searches, last 12 months
153K
Growth, 90 days vs prior 90
+33.2%
Conversion, latest week
1.3%
Market size, estimated
£101Ka year
Peak month
December2.6× the quietest month
Top search term
rock tumbler72K searches a year

02 · Price

A sale here is worth £50.88.

Listings sell for £50.88 on average, from £24.30 to £83.69. Amazon reports units sold in ranges. This niche sold 3K to 4K a year. The average listing sells 100 to 250 of them. At £50.88 that is £5K to £13K a year per listing.

Average price
£50.88inside the $15 to $100 sweet spot
Price range
£24.30–£83.69
Amazon United Kingdom median price
£12.12across 27,606 niches
Units sold a year
3K–4K
Units per listing a year
100–250
Revenue per listing a year
£5K–£13K
Returns
1.8%of orders · Amazon United Kingdom median 0.6%

03 · Entry bar

The bar here is ads and reviews.

92% of listings pay for placement with sponsored ads. 92% ship with Prime. On an average day, 29.6% of listings are out of stock. The average listing ranks #331 within Glassware. It carries 2,192 reviews at 4.22 stars, so a new listing needs social proof before a better product.

Sponsored listings
92%
Prime listings
92%
Out of stock, average day
29.6%
Average rank
#331in Glassware
Average rating
4.22 starsAmazon United Kingdom average 4.36 stars
Average reviews
2,192per listing
Listings tracked
12

04 · Newcomers

1 of last year's 5 launches cleared the first-year sales bar.

5 products launched here in the last 12 months. 1 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 34 months on average, so a newcomer is not facing entrenched names.

Launched, last 12 months
5
Successful launches
1Amazon's first-year sales bar
Average brand age
34 months

Products

Top Rock Tumbler products & what they sell for

The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.

Prices and ratings read from Amazon on Jul 27, 2026. The live listing can differ.

Competition

Competition: brands, sellers & click share

The top 5 products take an estimated 70% of clicks. A locked shelf that new listings rarely crack.

£0£10K£20K£30K£40K101001K10K100K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

5 falling

Sellers

13

Est. top-5 brand share

100%

Top 20: 100%

Est. top-5 click share

70%

Top 20: 100%

Open market

0%

  • Blue Marble53%
  • Jofuni28%
  • StemRock12%
  • Acmeenjoy5%
  • KomeStone4%
  • Open — no brand owns it (0%)

Demand

Rock Tumbler search demand

Weekly searches over the year, seasonality beneath. Pick a range.

7K5KSpike '24Holiday '24Spike '25Prime Day '25Black Friday '25SepDecMarJunAugNovMarMay

Peak months: Nov, Dec · busiest ÷ quietest = 2.6×

Search terms

Top Rock Tumbler search terms shoppers use

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

  • rock tumbler72K/yr
  • rock tumbler machine25K/yr
  • stone polishing machine11K/yr
  • stone polishing kit7K/yr
  • rock polisher9K/yr
  • stone polisher5K/yr
  • stone tumbler machine uk5K/yr
  • rock tumbler kit6K/yr
  • stone tumbler4K/yr
  • national geographic rock tumbler4K/yr

Reviews and returns

What reviews say buyers love and hate about Rock Tumbler

We read the reviews and the return reasons for every product selling here.

15%of positive reviews mention “Quality-Overall”
34%of negative reviews mention “Durability”
1.8%of orders come back
“Not built to last”
A buyer, on “Durability”34% of negative reviews mention the same topic

Every topic

Every topic buyers talk about, one row each.

Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.

21 topics

NegativePositive

FAQ

Common Rock Tumbler questions

Answered from the same tracked data.

Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data