diamond tester
Skip it51/100a concentrated shelf (top 5 take 90% of clicks) — diamond tester doesn't clear our bar today.
Market/yr
$2.7M
Growth (1y)
+169.6%
Products
9
Brands
9
was 7 a year ago
Sellers
12
Price range
$9.15–$239.57
Returns
5.9%
Rating
4.0★
Skip it
Scored 51/100 across market size, growth, competition, quality gap, and returns.
Demand
Weekly Amazon search volume, last 104 weeks — +169.6% year over year.Seasonality
Monthly demand index across the year — 1.00 is average.No pronounced peak months · busiest ÷ quietest = 1.4×
Competition
- HMKIS44%
- Siziviki18%
- Hqdz15%
- Valkynos10%
- Marvelity3%
- Hqdz-td3%
- Other (3 brands)7%
The top 5 products capture 90% of clicks — a locked-up shelf that new listings rarely crack. 9 brands and 12 sellers compete here.
Brands
9 rising
was 7 a year ago
Sellers
12
Top 5 brand share
90%
Product shelf
All 9 tracked products in this niche.
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
Diamond Tester High Accuracy Jewelry Diamond Tester Professional Diamond Tester Pen Jeweler Tool for Novice and Expert - Diamond Selector II 9V Battery Included(Black Diamond Testers)
Hqdz
$15.274.1★7,516 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
Diamond Tester Pen High Accuracy Jewelry Tester Battery Included Gemstone-Only Detection - No Metal/Gold Testing for Novice and Expert Gemologists
Marvelity
$9.153.1★31 reviews
Diamond Tester High Accuracy Diamond Tester Pen Environmental Protection 9V Battery Professional Diamond Selector for Jeweler Novice and Expert Thermal Conductivity Meter (Diamond Tester)
Hqdz-td
$15.634.3★107 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
High Accuracy Professional Diamond Tester Pen with 365nm UV Light & Thermal Sensor Fast 0.5s Detection Diamond Tester Professional Jewelers Gemstone Detector (Diamond Tester Pen)
UVER
$38.044.3★20 reviews
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“straightforward it is”
“Good value for the money”
“A great quality tool that is very reasonably priced”
“it works as advertised”
“It works ok”
“The included instructions were helpful”
“The pen is lightweight”
“It does give accurate reading”
“Its made very durable”
“efficient in meeting my needs”
What buyers complain about
“stopped working”
“Low quality product”
“Doesn't last”
“Unreliable results and questionable accuracy”
“terribly written directions”
“CRAPPY I SHOULD HAVE KNOWN BY THE PRICE”
“The non-rechargeable battery dies quickly”
“is not convenient to use”
“The detection probe is fragile and loose, slow response and hard to operate stably for long time use”
“False reading on moissanite”
Top return reasons
- Functionality-Overall47%
- Advertised Vs Actual Product8%
- Defective Material/Parts7%
- Measurement/Reading Accuracy7%
- Value For Money5%
- Instructions/User Manual/Troubleshooting4%
- Quality-Overall4%
- Certifications3%
- Charging3%
- Ease Of Use2%