The 6 Best gemstone testers (2023 reviews)

The features department is where hqdz gemstone tester truly manages to shine. It's a must have for jewelers. The Hqdz diamond tester pen is simple to operate to get results, professional(s) are not required. It includes this one that is super easy to use and the battery. There’s a bar of LED that lights up if it’s a real diamond and it beeps. The tip heats up quickly and the scale is easy to adjust and read.

This is only for diamonds, which can be tested electrically or thermally. It is a great little tool to use when testing gem stones. It definitely passes a diamond tester. It is very easy to use and 100% accurate.

Why We Like This:

Nice little tester good for testing jewelry
Diamonds are tested either thermally or electrically
Professional diamond tester with light and sound indicator
Perfect gift for any gemstone collector

Best For Testing: Presidium gemstone Tester

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The presidium gemstone tester is specially designed for your daily usage and has all useful features. It is great to distinguish glass from gemstones. It takes the uncertainty out of most gemstones. It can test only crystalline stones, not opaque. It is easy to use | clear and easy-to-read analog dial. It will buzz obnoxiously at you if you hit the metal but that's better than it giving you a false reading. It has a small soft carrying case with zippers. It is perfect for a first line of identification and even jewelry/gemstone experts can put this to use. It is a must have if your hobby involves gemstones.

Why We Like This:

A must have for jewelry collectors
Gives a range of what the stone could be
Main purpose is to distinguish glass from stones in jewelry
Redesigned to be more compact, sturdy and portable

Best For price: Dupeakya gemstone Tester

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Not everyone likes to purchase tester for their regular usage, but the dupeakya gemstone tester would be an anomoly. These are beautiful, flawless, and very sparkly gemstones. It is an electronic instrument designed and manufactured according to the thermal conductivity of diamonds to identify the true and false diamonds. It is made of carbon which is a great conductor of currents. It detects diamonds well if you follow the instructions.

This tester does test for various stones and is capable of detecting amethyst, garnet, topaz, and diamond. The level wheel is a sensitivity selector. It comes with a soft case and small stone tray.

Why We Like This:

Simple devise to help quickly determine authenticity of stone
Great tester for gems and diamonds
A must for someone who has jewelry

Best little Tester: Ketar gemstone Tester

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Simple calibration for stones of various sizes the jewelry tester silver and diamond tester are easy to use even for a new beginner, tester electronic pen is also a great tool to have when testing your own jewelry. The gem and diamond tester is designed to indicate genuine diamond or fake, working time is about 2 hours of continuous use.

The gemstone tester pen dimensions are 6.6 Inches long, 1.6 Inches wide, and 0.8 Inches thick. The tester indicates genuine diamond or fake, the jewelry tester meter is designed and manufactured according to the thermal conductivity of diamond, the fake crystal, and a simulant such as cubic zirconia does not have any reaction. You will be able to know in a few seconds whether an item is fake or not, there are the LED indicator and the audible signal a red light will be displayed and an audible indicator will sound if the stone is a real diamond. It comes with a vinyl protection case.

Why We Like This:

Excellent product to detect validation of stones
Wide uses of electronic diamond tester
Easy to operate jade jewelry tester
Great little tester that comes with little vinyl protection case

Best primary Tester: Smartpro gemstone Tester

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Smartpro offers a variety of tester for personal choice and yet maintaining quality in all the variants. It is developed to distinguish between diamond and its other simulants using the principles of thermal conductivity. It is heated electronically, while the other is cooled by the gemstone being tested. It also has a fantastic little manual for which the other unit does not. It will detect lab created gems, and naturally made gems.

The ambient temperature in the office has to be at the very least 72 degrees for it to warm up. It is very user friendly and has a clear display. While automatic shut off is a nice feature it does work kind of quickly. It just tells you the range in hardness really. It is easy to use and not too difficult to understand.

Why We Like This:

Portable tester that can be used anywhere
Best used for faceted stones indoors
Identifies metals, simulants and diamonds instantly
Needle points to glass just by waving the pen around

Best value For money: Velaurs gemstone Tester

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The velaurs gemstone tester should be able to handle its purpose and duties with ease. This diamond tester has a highly compact design and will help you to tell the difference between a genuine diamond and fake diamond. It will make continuous buzzing sound when the user accidentally touches metal rather than stone. It comes with a pu case and small testing platform for holding loose stones. It is easy to calibrate gems of various sizes. It is light, compact and easy to carry, designed for fast, accurate and safe diamond testing. It is easy to use even for a new beginner. The tester provides a highly compact design and will help you to tell the difference between a genuine diamond and fake diamond. This item is very accurate and affordable.

Why We Like This:

Led light and audio result indication
Simple calibration for stones of various sizes
Can be used for fast, accurate and safe diamond testing