Presidium Gem Tester
FailBuyers convert on only 0.5% of searches, so Presidium Gem Tester is a Fail.
- Flapen Score
- 39 / 100Ranks 3,666 of 4,656 Arts, Crafts & Sewing niches · −7 vs the category median of 4639
- Market size
- $150K/yr230K searches / yr
- 90-day growth
- -15.4%search demand this quarter
- Competition
- 57%top-5 click share · 13 brands · 25 sellers
Flapen Score
Presidium Gem Tester against its category
The dotted line is the Arts, Crafts & Sewing average. Past it, Presidium Gem Tester is stronger. Inside it, weaker.
Market
The Presidium Gem Tester market on Amazon at a glance
Shoppers on Amazon United States searched for Presidium Gem Tester 230K times last year and spent an estimated $150K. The top 5 brands take 74% of clicks. Flapen scores it 39 out of 100, a Fail.
01 · Demand
An estimated 0.5% of those searches ended in a purchase.
Shoppers searched for this 230K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 0.5% of those searches ended in a purchase. Searches in the last 90 days moved -15.4% against the 90 days before. Searches, conversion and average price together put the market at an estimated $150K a year.
- Searches, last 12 months
- 230K
- Growth, 90 days vs prior 90
- -15.4%
- Conversion, latest week
- 0.5%
- Market size, estimated
- $150Ka year
- Peak month
- April1.2× the quietest month
- Top search term
- gem tester45K searches a year
02 · Price
A sale here is worth $122.91.
Listings sell for $122.91 on average, from $10.63 to $409.31. Amazon reports units sold in ranges. This niche sold 4K to 5K a year. The average listing sells 100 to 250 of them. At $122.91 that is $12K to $31K a year per listing.
- Average price
- $122.91above the $15 to $100 sweet spot
- Price range
- $10.63–$409.31
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 4K–5K
- Units per listing a year
- 100–250
- Revenue per listing a year
- $12K–$31K
- Returns
- 5.3%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is low.
75% of listings pay for placement with sponsored ads. 90% ship with Prime. On an average day, 1.9% of listings are out of stock. The average listing ranks #83 within Jewelry Making Tools & Accessories. It carries 1,095 reviews at 4.06 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 75%
- Prime listings
- 90%
- Out of stock, average day
- 1.9%
- Average rank
- #83in Jewelry Making Tools & Accessories
- Average rating
- 4.06 starsAmazon United States average 4.42 stars
- Average reviews
- 1,095per listing
- Listings tracked
- 20
04 · Newcomers
Brands here are settling in.
The brands on the shelf have sold for 47 months on average, so the names here are settling in.
- Launched, last 12 months
- 0
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 47 months
Products
Top Presidium Gem Tester 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 6, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Presidium Instruments Gem Tester II (PGT II) with Assisted Thermal Calibration (ATC) for Identifying Diamonds/Moissanites and Common Colored Gemstones
- Price
- $284.96
- Rating
- 4.2/5
- Reviews
- 1,373
- Age
- 19y ago

HMKIS Diamond Tester Pen with 60X Jewelry Loupe (Non-Rechargeable)
- Price
- $16.94
- Rating
- 4.0/5
- Reviews
- 8,496
- Age
- 5y ago

Purity Testing Kit for Diamonds Gemstones Moissanites Gold Silver and Platinum Jewelry Electronic Digital Diamond Tester Machine JSP GTE
- Price
- $38.51
- Rating
- 4.3/5
- Reviews
- 760
- Age
- 3y ago

Siziviki Diamond Tester Pen Pro High Accuracy Jewelers Diamond Detector
- Price
- $10.63
- Rating
- 4.0/5
- Reviews
- 1,109
- Age
- 4y ago

Chelsea Filter for Gemstone Identification Quickly Distinguish Genuine Emeralds Rubies Sapphires Aquamarine Glass Filter Reliable Portable Ideal for Gemologists and Jewelers
- Price
- $21.77
- Rating
- 4.0/5
- Reviews
- 122
- Age
- 2y ago
Trending
estimated 90-day click momentum
KooingTech Diamond Tester Jewelry Refractometer RHG181 1.30-1.81
- Price
- $76.80
- Rating
- 4.4/5
- Reviews
- 19
- Age
- 1y ago

Gemtone All-in-One Gold Silver Platinum & Diamond Jewelry Testing and Appraisal Kit with Solutions Digital Scale Diamond Tester Touchstone and Accessories
- Price
- $56.80
- Rating
- 4.3/5
- Reviews
- 233
- Age
- 10mo ago

Purity Testing Kit for Diamonds Gemstones Moissanites Gold Silver and Platinum Jewelry Electronic Digital Diamond Tester Machine JSP GTE
- Price
- $38.51
- Rating
- 4.3/5
- Reviews
- 760
- Age
- 3y ago

Diamond Tester Jewelry Gem Stone Tester Kit Professional 2-in-1 Tester for Diamonds Moissanite Metals and Gemstones
- Price
- $103.80
- Rating
- 3.8/5
- Reviews
- 30
- Age
- 1y ago

Lumirio Gemstones UV Flashlight Super Bright Gem Tester for All Stones Rechargeable Jade Jewelry Test Light Yellow White UV 365nm 395nm Flashlight for Gem Stones Wooden Jewelry
- Price
- $27.32
- Rating
- 4.5/5
- Reviews
- 102
- Age
- 4y ago
Newest
by launch date
Gemtone All-in-One Gold Silver Platinum & Diamond Jewelry Testing and Appraisal Kit with Solutions Digital Scale Diamond Tester Touchstone and Accessories
- Price
- $56.80
- Rating
- 4.3/5
- Reviews
- 233
- Age
- 10mo ago

CXCTCT Gem Refractometer High Precision Tester for All Gemstone Jewelry Identification
- Price
- $97.08
- Rating
- 5.0/5
- Reviews
- 2
- Age
- 10mo ago

Valkynos Professional Diamond Tester Pen with 365nm UV Light & Thermal Sensor Fast 0.5s Detection Portable Gem Checker for Novice & Experts Battery Included
- Price
- $32.74
- Rating
- 4.2/5
- Reviews
- 262
- Age
- 1y ago

Professional Diamond Tester Pen High Accuracy Jewelry Diamond Tester Electronic Diamond Gem Tester and Tester Pen 60X Magnifying Glasses Tool Kit for Novice Expert (Diamond Tester Pen)
- Price
- $19.75
- Rating
- 3.9/5
- Reviews
- 178
- Age
- 1y ago

KooingTech Diamond Tester Jewelry Refractometer RHG181 1.30-1.81
- Price
- $76.80
- Rating
- 4.4/5
- Reviews
- 19
- Age
- 1y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 57% of clicks. Leaders hold, but buyers still shop past them.
Brands
13 flat
Sellers
25
Est. top-5 brand share
74%
Top 20: 100%
Est. top-5 click share
57%
Top 20: 100%
Open market
21%
- Presidium42%
- TEKCOPLUS10%
- HMKIS9%
- GTE8%
- Siziviki5%
- Gemtone5%
Demand
Presidium Gem Tester search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.2×
Search terms
Top Presidium Gem Tester search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- gem tester45K/yr
- presidium gem tester38K/yr
- gemstone tester36K/yr
- gem tester for all stones35K/yr
- gemstone tester for all stones15K/yr
- presidium gem tester ii12K/yr
- gem tester for all stones and metal11K/yr
- presidium10K/yr
- presidium multi tester iii5K/yr
- presidium gem tester for all stones3K/yr
Reviews and returns
What reviews say buyers love and hate about Presidium Gem Tester
We read the reviews and the return reasons for every product selling here.
“Bad Quality”
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.
17 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 Presidium Gem Tester 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









