Top 10 best rated cheap  Diamond Testers reviews to buy

Best Diamond Testers to Buy in 2020 [Updated]

Last updated: Jun 24, 2020 By Jamie


top rated Models tested 25 Models Considered
hours of research 44 Hours of Research
experts interviewed 9 Experts Interviewed
best Reviews Analyzed 95 Reviews Analyzed

If you’re questioning, what is the Best Diamond Testers for Daily Use? You’re at right place. Well finding the good one isn’t an easy task. So we’ve consulted top experts who has in and out knowledge about it. After testing a couple of products, our team listed down top 10 valuable items which performed a lot better than the rest hundreds of options.

Our team spent tons of hours in order to find out the best option available right now in the USA market. An increasingly popular option is a HDE High Accuracy, which is unbeatable in case of reliability and performance. However, if you have a low budget or wanna save some bucks, you can check out Presidium Gem Tester II. In both, you’ll get all those features which you expect in Diamond Testers.

To ease your work and save your time, we created a comparison table of Top 10 Best Selling Diamond Testers. All the products are sort based on expert’s reviews.

Top 10 Best Diamond Testers Reviewed : Top Selling in USA 2020


1st Place

HDE High Accuracy
HDE High Accuracy


9. 7

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Best Value

Presidium Gem Tester II
Presidium Gem Tester II

By Presidium

9. 5

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Presidium Diamond Mate-C
Presidium Diamond Mate-C

By Presidium

9. 1

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Gemoro Testerossa
Gemoro Testerossa

By Gemoro

8. 8

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GemOro UltraTester 3+
GemOro UltraTester 3+

By Gemoro

8. 6

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Presidium Adamas
Presidium Adamas

By Presidium

8. 2

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Gemlogis Mantis 3 in 1
Gemlogis Mantis 3 in 1

By Gemlogis

8. 0

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Gemetrix Melee Inspector
Gemetrix Melee Inspector

By Gemetrix

7 .7

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Oris Terminator II
Oris Terminator II

By RS Mizar

7. 4

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Top 10 Best rated Diamond Testers in USA 2020 : Read Detailed Reviews

For convenience, we have listed down the Top 10 Best Diamond Testers of 2020 which we reviewed.

After investing a lot of time, here we list down top Best Diamond Testers with their Key Features. All of them are crushing the USA market. Without any further delay, let’s check them out:-

#1 HDE High Accuracy – Best & Top rated Diamond Testers

Patrice is constantly shopping for jewelry, trading diamonds, sorting through scrap jewelry, and bidding at estate sales and auctions Patrice wants to find the highest quality diamonds to use to make the pieces for her jewelry collections This diamond tester indicates whether Patrice’s stones are genuine diamonds or fakes.

best HDE High Accuracy reviews
Key Features
  • Professional diamond selector ii will indicate genuine diamond or fake
  • Uses large small switches for testing diamonds
  • Emits audible sounds to easily differentiate the readings
  • Diamand tester is battery powered for convenience
  • Package contents 1 x diamond tester

#2 Presidium Gem Tester II Diamond Testers 2020

The Presidium Gem Tester II (PGT II) developed to distinguish between diamonds and its other simulants using the principles of thermal conductivity The Presidium Probe Pen consists of two linked thermometers One heated electronically while the other is cooled by the gemstone being tested The difference in temperature creates an electrical output which is displayed on the Analog Dial on the front of the Gem Tester II.

cheap Presidium Gem Tester II 2020
Key Features
  • Make sure this fits by entering your model number.
  • Includes gemtester ii probe pen ac adapter user handbook warranty registration card case
  • Built in calibration cal and glass test discs
  • Probe pen with a retractable thermoelectric tip isthe industrys thinnest at 0.6mm for testing diamonds as small as 0.02 ct
  • Enclosed ac adapter or you may use 2 aa batteries for on the go

#3 Presidium Diamond Mate-C

For diamond testing results that are fast, easy, and reliable, this is it Verses the sub-standard tester model that isn’t backed by the reliability and stability of Presidium Instruments Sadly, most testers don’t meet the basic qualifications of a good gem tester: ease, reliability, and speed Luckily, the Presidium DiamondMate-C Electronic Diamond Tester meets and exceeds these qualifications.

powerful Presidium Diamond Mate-C
Key Features
  • Make sure this fits by entering your model number.
  • Included rechargeable batteries and ac adapter
  • Pocket sized very portable
  • 1 year factory warranty

#4 Gemoro Testerossa 2020

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reliable Gemoro Testerossa
Key Features
  • Make sure this fits by entering your model number.
  • Identifies detects and separates diamond from cz moissanite and white sapphire with new enhanced m
  • New enhanced moissanite testing technology for low conductivity stone identification
  • Led stone illumination and uv fluorescence detectionretractable probe tip with enhanced durability
  • Powered by micro usb or with its included rechargeable nimh batteries or your aaa akaline batteries
  • Unprecedented 10 year probe tip warranty lifetime limited replacement warranty on the tester

#5 GemOro UltraTester 3+ Cheap and affordable

The Ultimate Tester For Diamond Fraud Protection exclusively recommended By Charles & Colvard, manufacturer Of created Moissanite The Testerossa features new advanced exclusive technology capable of identifying the widest range of the electrically conductive moissanite material available The next generation ultimate tester for diamond fraud protection with new enhanced moissanite testing technology for low conductivity stone identification.

top selling GemOro UltraTester 3+
Key Features
  • Recommended by charles colvard
  • Detects the widest range of moissanite including forever one moissanite
  • Tests for diamonds moissanite and white sapphire

#6 Presidium Adamas

The patented GemOro ultratester 3+ features Features new exclusive uv-f1 moissanite identification technology capable of detecting the widest range of the electrically conductive moissanite, including the new super-low electrically conductive forever one moissanite -Identifies, detects and separates diamond from cz, moissanite (including the new most difficult F1 moissanite) and white sapphire -features new exclusive uv-f1 moissanite identification technology capable of detecting the widest range of the electrically conductive moissanite, including the new super-low electrically conductive forever one moissanite -sleek patented ergonomic shape comfortably rests in and on your hand when held -intuitive patented finger grip pads for increased User-Friendliness and ease of use -LED stone illumination and UV fluorescence detection -precision retractable probe-tip with Enhanced durability -virtually indestructible ABS housing -Fast warm-up time -Unique Beep tones & patented glowing probe tip and light pipe indication: green = Diamond, Blue = moissanite, pink = sapphire and red = metal alert -includes a GemOro protective ballistic nylon carrying case, aluminum loose stone holder, GemOro test stone cloth, as well as (3) user-replaceable AAA NiMH rechargeable batteries, a universal multi-voltage 100v-240v AC adapter/ charger cube with premium micro-USB cord -exclusive two year probe tip warranty (Note: the entire unit will be replaced in the event of tip damage) -unprecedented lifetime limited warranty -may be used with optional exclusive patented GemOro ultradock 3 (item #0772) charging station and GemOro test stone Magnifier (item #0780) attachment -powered by micro-USB or with its included 3 AAA rechargeable NiMH batteries (user may substitute 3 AAA alkaline batteries if desired) -auto-off function if accidentally left on preserves battery life -Superior surface mount technology (SMT) -battery saving auto-off function -Designed in the USA.

top best Presidium Adamas
Key Features
  • Identifies diamonds moissanites simulants and metals instantly
  • Accurate testing on diamonds as small as 0.02ct and diamond melee as small as 0.01ct optional micro tip required
  • Retractable thermoelectric probe tip that ensures constant pressure between probe and gemstone for enhanced accuracy
  • Light and portable simple and easy to use and compatible with omi web app
  • Includes presidium adamas tester as well as a 100 240v usb charger

#7 Gemlogis Mantis 3 in 1

Presidium presents Adamas- the epitome of cutting-edge technology With a revolutionary replaceable probe tip that minimizes equipment downtime, Adamas also has a micro probe tip that is the first in the world to measure diamond melees as small as 001 carats A hallmark of dedicated design featuring a dynamic LED display and a sleek ergonomic grip, Adamas reaches new heights and presents new possibilities with the precision, quality and reliability long associated with Presidium products.

buy Gemlogis Mantis 3 in 1
Key Features
  • Make sure this fits by entering your model number.
  • Lcd display
  • Quick and accurate testing of loose melee or mounted stones colored or colorless gemstones regardless of shape or rough cut and as small as 0.02 ct.
  • Visible violet light technology
  • Designed for left or right handed use
  • Batterys not included

#8 Gemetrix Melee Inspector

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mini Gemetrix Melee Inspector
Key Features
  • Bright illumination both white light and ultra violet
  • Portable with the option of using a 9v battery
  • Easy to identify suspect diamonds
  • Viewing magnifier lens
  • Smart phone compatible

#9 Oris Terminator II

Mantis is the latest diamond tester that works independently or in-conjunction with Gemlogis BLEU- a color stone meter with touch sensitive display to further identify the stone type Quick and accurate testing of loose melee or mounted stones colored or colorless gemstones,regardless of shape or rough cut and as small as 0.

best Oris Terminator II reviews
Key Features
  • Make sure this fits by entering your model number.
  • Discontinuous beep and flashing green light indicates moissanite or synthetic gem ston
  • Used to test moissanites no waiting between tests.
  • Operates only on 9 volt alkaline battery included.
  • Includes probe cover loose stone holder.
  • Two year limited warranty. made in u.s.a.


Diamonds grown by high-pressure and high-temperature (HPHT) methods represent the vast majority of near-colorless synthetic diamonds of melee size These diamond exhibit the phenomenon of phosphorescence after exposure to short-wave ultraviolet light The Melee Inspector features ultra-violet lamps to excite any HPHT diamonds which will then phosphoresce.

best selling
Key Features

Buying Guide: How to Buy the Best Diamond Testers

It’s not easy to buy something with which you’re not familier. That’s why tested huge numbers of Diamond Testers and choose the most performing and reliable ones for you.

Below, we have gathered all the necessary information required to analyze Diamond Testers as per your requirements.

1. Quality and Durabiity

The durability of Diamond Testers represents the ability to withstand and function effectively even in not suitable situations. The durability ensures long-lasting nature without any damage to the product. Moreover, the maintenance of the item depends on its type and frequent usage.

2. Brand Reputation

One last consideration you should take into account when you’re buying for Diamond Testers is the reputation of the brand. There are literally a huge numbers of of brands out there for you to choose from.

However, you will find a few main brands that are dominating the Diamond Testers market. These brands not only stand above the others, but have a reputation for creating quality products. We dug into the consumer reviews for models made by each brand to get a clearer idea of what customers think about their products.

3. Value for Money

Price ranges are broad in the Diamond Testers market, and when ranking the best among all, it’s imperative to separate the true features from the flash. Reliability, performance, and functional designs raise some of them to the top of the list. A high price tag doesn’t guarantee high durability and satisfaction.

4. Warranty

Pick a best product that comes with a longer warranty period to make yourself tension – free. Although, the product works well but you have to take some care by following the instructions given by the manufacturer. Get a clear idea on warranty policies before buying the Diamond Testers.

How we Tested?

Testing a four-five items is easy, but more than that isn’t. To make the whole process easy and to get decent some # at the end, our team simplify the testing procedure by divided into steps. Here are they:

1. Make a List

Initially, one of our team member creates a list of all the items available for shipping in the United States. It also includes the products which are available in local stores and malls. So, we only choose those which are available for you.

2. Sort out the Best selling # in USA

A tons of models are available in USA. To further break them down, we select those which are top selling and crushing the market right now. For that we do some online research and also forward the list to some trusted store’s owners. It take a couple of days to get complete.

3. Apply Filters

Filters always make it easy for us to find best, isn’t it? So we applied couple of filters like Popularity among customers, Features, Brand Trustness, Price, Durability, and many more. And finally we give the sorted products to our team to start testing.

4. Assign the Task

So here we reach at our final step from where the real testing starts. We have distinct team for each type of testing, like separate squad for performance, strength, reliability testing. Our manager assign the task among them and sort out some decent options from the results.


The above are the product reviews and recommendations about the Best Diamond Testers in USA. Therefore, we have listed the 10 top performing ones for your information. Hence, follow the Buyer’s Guide religiously to derive maximum benefit of product recommendations.

After analyzing the results, without any doubt we can say HDE High Accuracy and is the best option for you right now. Althrough, Presidium Gem Tester II is also fabulous choice if you want a little cheaper one. Do check them out both.

Have a Great Day!