Rock Tumbler Refill
FailThe top 5 brands take 100% of clicks, so Rock Tumbler Refill is a Fail.
- Flapen Score
- 37 / 100Ranks 239 of 262 Industrial & Scientific niches · −15 vs the category median of 5237
- Market size
- $46K/yr19K searches / yr
- 90-day growth
- -8.1%search demand this quarter
- Competition
- 86%top-5 click share · 5 brands · 14 sellers
Flapen Score
Rock Tumbler Refill against its category
The dotted line is the Industrial & Scientific average. Past it, Rock Tumbler Refill is stronger. Inside it, weaker.
Market
The Rock Tumbler Refill market on Amazon at a glance
Shoppers on Amazon United States searched for Rock Tumbler Refill 19K times last year and spent an estimated $46K. All 5 brands take every click. Demand peaks in Jan–Nov–Dec. Flapen scores it 37 out of 100, a Fail.
01 · Demand
An estimated 9.2% of those searches ended in a purchase.
Shoppers searched for this 19K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 9.2% of those searches ended in a purchase. Searches in the last 90 days moved -8.1% against the 90 days before. Searches, conversion and average price together put the market at an estimated $46K a year.
- Searches, last 12 months
- 19K
- Growth, 90 days vs prior 90
- -8.1%
- Conversion, latest week
- 9.2%
- Market size, estimated
- $46Ka year
- Peak month
- December6.2× the quietest month
- Top search term
- rock tumbler refill kit7K searches a year
02 · Price
A sale here is worth $26.23.
Listings sell for $26.23 on average, from $12.64 to $41.72. Amazon reports units sold in ranges. This niche sold 2K to 2K a year. The average listing sells 100 to 250 of them. At $26.23 that is $3K to $7K a year per listing.
- Average price
- $26.23inside the $15 to $100 sweet spot
- Price range
- $12.64–$41.72
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 2K–2K
- Units per listing a year
- 100–250
- Revenue per listing a year
- $3K–$7K
- Returns
- 0.7%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is ads and reviews.
92% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #156 within Abrasive & Finishing Products. It carries 6,231 reviews at 4.69 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 92%
- Prime listings
- 100%
- Out of stock, average day
- 0.0%
- Average rank
- #156in Abrasive & Finishing Products
- Average rating
- 4.69 starsAmazon United States average 4.42 stars
- Average reviews
- 6,231per listing
- Listings tracked
- 12
04 · Newcomers
Brands here are established.
The brands on the shelf have sold for 69 months on average, so the names here are established.
- Launched, last 12 months
- 0
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 69 months
Products
Top Rock Tumbler Refill 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 Aug 6, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
NATIONAL GEOGRAPHIC Rock Tumbler Grit and Polish Refill Kit - Tumbling Grit Media Polish Up to 20 lbs. of Rocks Works with any Rock Polisher & Tumbler Supplies
- Price
- $23.90
- Rating
- 4.7/5
- Reviews
- 18,734
- Age
- 9y ago

National Geographic Rock Tumbler Refill Kit with 1 Lb. Gemstone Mix
- Price
- $15.09
- Rating
- 4.6/5
- Reviews
- 6,150
- Age
- 10y ago

LARICEO Rock Tumbler Grit and Polish Refill Set 4-Step 3 lb
- Price
- $21.84
- Rating
- 4.8/5
- Reviews
- 290
- Age
- 1y ago

NATIONAL GEOGRAPHIC Rock Tumbler Grit & Media Refill Kit Rock Polishing Supplies Kit 4-Stage Silicon Carbide Bulk Grit 1.5 Pounds of Ceramic Pellets Stone Tumbling & GemFoam Polishing Media
- Price
- $38.93
- Rating
- 4.7/5
- Reviews
- 18,734
- Age
- 4y ago

National Geographic Rock Tumbler Refill Kit with 5 Lbs. Rough Rocks
- Price
- $35.43
- Rating
- 4.6/5
- Reviews
- 2,014
- Age
- 6y ago
Trending
estimated 90-day click momentum
NATIONAL GEOGRAPHIC Rock Tumbler Grit & Media Refill Kit Rock Polishing Supplies Kit 4-Stage Silicon Carbide Bulk Grit 1.5 Pounds of Ceramic Pellets Stone Tumbling & GemFoam Polishing Media
- Price
- $38.93
- Rating
- 4.7/5
- Reviews
- 18,734
- Age
- 4y ago

10 Pounds Rock Tumbler Grit Refill - Rock Polishing Grit Media Kit
- Price
- $32.65
- Rating
- 4.7/5
- Reviews
- 486
- Age
- 3y ago

LARICEO Rock Tumbler Grit and Polish Refill Set 4-Step 3 lb
- Price
- $21.84
- Rating
- 4.8/5
- Reviews
- 290
- Age
- 1y ago

LARICEO Rock Tumbler Grit and Polish Refill Set with Ceramic Media 4.5 lb
- Price
- $26.14
- Rating
- 4.7/5
- Reviews
- 268
- Age
- 2y ago

NATIONAL GEOGRAPHIC Rock Tumbler Grit and Polish Refill Kit - Tumbling Grit Media Polish Up to 20 lbs. of Rocks Works with any Rock Polisher & Tumbler Supplies
- Price
- $23.90
- Rating
- 4.7/5
- Reviews
- 18,734
- Age
- 9y ago
Newest
by launch date
The Thames & Kosmos Rock Tumbler Refill Pack for use with The Thames & Kosmos Rock Tumbler Essential STEM Tool for Kids | Includes Rough Rocks Polishing Grit Jewelry Settings
- Price
- $12.64
- Rating
- 5.0/5
- Reviews
- 6
- Age
- 1y ago

LARICEO Rock Tumbler Grit and Polish Refill Set 4-Step 3 lb
- Price
- $21.84
- Rating
- 4.8/5
- Reviews
- 290
- Age
- 1y ago

LARICEO Rock Tumbler Grit and Polish Refill Set with Ceramic Media 4.5 lb
- Price
- $26.14
- Rating
- 4.7/5
- Reviews
- 268
- Age
- 2y ago

10 Pounds Rock Tumbler Grit Refill - Rock Polishing Grit Media Kit
- Price
- $32.65
- Rating
- 4.7/5
- Reviews
- 486
- Age
- 3y ago

WKTURN Rock Tumbler Grit Set - 4 Step Tumbling Media (Coarse Medium Grit Pre-Polished Final Polish) Set 2.0 for Any Brand of Rock Polisher
- Price
- $19.29
- Rating
- 4.5/5
- Reviews
- 796
- Age
- 4y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 86% of clicks. A locked shelf that new listings rarely crack.
Brands
5 falling
Sellers
14
Est. top-5 brand share
100%
Top 20: 100%
Est. top-5 click share
86%
Top 20: 100%
Open market
0%
- Blue Marble82%
- LARICEO12%
- YHAspace3%
- Thames & Kosmos2%
- WKTURN1%
Demand
Rock Tumbler Refill search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Jan, Nov, Dec · busiest ÷ quietest = 6.2×
Search terms
Top Rock Tumbler Refill search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- rock tumbler refill kit7K/yr
- national geographic rock tumbler refill6K/yr
- rock tumbler refill6K/yr
Reviews and returns
What reviews say buyers love and hate about Rock Tumbler Refill
We read the reviews and the return reasons for every product selling here.
“Smaller than I thought”
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.
19 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Rock Tumbler Refill 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









