presidium gem tester
Worth a look54/100presidium gem tester shows beatable incumbent ratings (4.0★), but a small market ($366K/yr) keeps it on the watch list.
Market/yr
$366K
Growth (1y)
+304.3%
Products
16
Brands
11
was 14 a year ago
Sellers
21
Price range
$10.95–$409.89
Returns
5.7%
Rating
4.0★
Worth a look
Scored 54/100 across market size, growth, competition, quality gap, and returns.
Demand
Weekly Amazon search volume, last 104 weeks — +304.3% year over year.Seasonality
Monthly demand index across the year — 1.00 is average.No pronounced peak months · busiest ÷ quietest = 1.3×
Competition
- Presidium43%
- HMKIS11%
- TEKCOPLUS9%
- Siziviki8%
- GTE6%
- Valkynos4%
- Other (5 brands)18%
The top 5 products take 61% of clicks — established leaders, but buyers still shop beyond them. 11 brands and 21 sellers compete here.
Brands
11 falling
was 14 a year ago
Sellers
21
Top 5 brand share
78%
Product shelf
All 16 tracked products in this niche.
Presidium Instruments Gem Tester II (PGT II) with Assisted Thermal Calibration (ATC) for Identifying Diamonds/Moissanites and Common Colored Gemstones
Presidium
$283.114.2★1,335 reviews
HMKIS Diamond Tester Pen Professional Jewelry Diamond Tester with 60X Jewelry Loupe Magnifier Diamond Selector for Novice and Expert (Non-Rechargeable)
HMKIS
$16.984.1★8,313 reviews
Diamond Tester Professional Jewelers Gemstone Detector High Accuracy Diamond Checker Pen Professional for Jewelers Gem Tester (Jewelry-Only Detection)
Siziviki
$10.954.1★948 reviews
Purity Testing Kit for Diamonds Gemstones Moissanites Gold Silver and Platinum Jewelry Electronic Digital Diamond Tester Machine JSP GTE
GTE
$38.174.3★704 reviews
Presidium Multi Tester III (PMuT III) All-in-One Instrument for Testing Diamonds Moissanites and Diamond Simulants
Presidium
$225.393.7★403 reviews
Heavy Duty Calcite Dichroscope Gemstone Tester Trichoic Pleochroic Colors Gemstone Identification Gemstones Gemological Testing Diamond Jeweler Tool Metal Body Gemology
TEKCOPLUS
$32.334.3★303 reviews
Valkynos Professional Diamond Tester Pen with 365nm UV Light & Thermal Sensor Fast 0.5s Detection Portable Gem Checker for Novice & Experts Battery Included
Valkynos
$33.414.3★198 reviews
Chelsea Filter for Gemstone Identification Quickly Distinguish Genuine Emeralds Rubies Sapphires Aquamarine Glass Filter Reliable Portable Ideal for Gemologists and Jewelers
TEKCOPLUS
$21.704.0★104 reviews
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Very handy to have”
“If you're looking for something reliable, well-made, and at a fair price point, this is the perfect choice”
“Good for the money”
“Just what I needed”
“The diamond tester works fine”
“I love how lightweight it is”
“The included instructions were helpful”
“can be carried around conveniently”
“It does give accurate reading”
“Battery life is okay”
What buyers complain about
“Not even functional”
“Cheap quality”
“Broke”
“No instructions on use and cheaply made”
“Its pricey for the average person”
“Does't give accurate reading like it stated”
“Did I receive a defective product”
“The non-rechargeable battery dies quickly”
“Inadequate description”
“Hot garbage”
Top return reasons
- Functionality-Overall44%
- Advertised Vs Actual Product9%
- Measurement/Reading Accuracy8%
- Defective Material/Parts7%
- Value For Money5%
- Quality-Overall4%
- Instructions/User Manual/Troubleshooting4%
- Certifications3%
- Charging2%
- Ease Of Use2%