Surely, you’ve heard the saying,”Diamonds are a girl’s best friend.”

A very common expression – and with good reason. Many feel this way.

However, the saying should go,”the best diamond tester is everyone’s best friend.” That’s especially true for any jewelry enthusiast’s, really.

It seems funny, but bear with me for a minute.

Like every other industry, there are people who scam others by selling fake products.

Unfortunately, the diamond industry is no different.

In fact, in 2016, a Chinese tourist claimed that she was duped into buying $1 million worth of fake diamond jewelry. This is why a diamond tester is so incredibly important.

This cool gadget ensures that you buy real diamonds. We have compiled a list of the best diamond testers for you to choose from.

Find out which ones will protect you from being scammed.

1. Presidium Diamond Mate Tester (PDMT- C)

The Presidium Diamond Mate Tester (PDMT- C) may very well be the best diamond tester that’s pocket-sized.

It determines the authenticity of diamonds instantly and works on both polished and unpolished gemstones.

This diamond tester is capable of testing diamonds as small as 0.02 carats. It provides consistent, reliable results.

In fact, there are numerous positives when working with the Presidium Diamond Mate Tester (PDMT- C):

  • the display is clear and visible (which makes it easy to read results with confidence)
  • this diamond tester also comes with a protective carrying case
  • carry it in your pocket with ease (and without worry about damaging the diamond tester)

The Presidium Diamond Mate Tester (PDMT- C) quite handily determines if a gem is a diamond based on its thermal properties.

Price: $129 on AAJewelry.com.

2. Luckystone Jewelry Diamond Tester Selector II Tool LED + Jewelry Loupe

Luckystone Diamond Tester, many considering it the best diamond tester on the market

Image by LuckyStone, via Amazon.com

This is one tool that is extremely effective in distinguishing between metal and stone.

It makes a continuous buzzing sound when you accidentally touch metal instead of stone.

The Luckystone Jewelry Diamond Tester Selector II Tool delivers accurate readings as a result. It has an easy-to-read LCD display and LED indicator that works this way:

  • real diamonds cause the light to turn green
  • fake diamonds don’t get a reaction from the light indicator

This diamond tester also has a large/small switch that tests diamonds at +/- 8 points. It operates on one DC 9V battery, but you’ll have to buy one separately.

Price: $19.99 on Amazon.com.

3. HDE High Accuracy Professional Jeweler Diamond Tester For Novice and Expert

HDE High Accuracy Professional Jeweler Diamond Tester

Image by HDE, via Amazon.com

Featuring a low battery indicator for accurate readings, this tool could be the best diamond tester for many jewelry buyers.

It emits sounds to differentiate between different readings. The diamond tester has small and large switches for testing diamonds. It requires one 9V battery to operate.

The HDE High Accuracy Professional Jeweler Diamond Tester For Novice and Expert comes in a leather storage case. This storage case protects it while it’s not in use. It also enables you to take the diamond tester with you when you’re shopping. The HDE High Accuracy Professional Jeweler Diamond Tester also comes with a small testing tray.

Price: $13.99 on Amazon.com.

4. StillCool Diamond Tester II V2 Selector Gemstone Jewelry Gems Tool with Case

StillCool Diamond Tester II

Image by StillCool,  via  Amazon.com

This portable diamond tester provides fast, accurate, and safe testing to determine if a gem is a diamond.

It features an LCD display and an LED indicator.

The tool has no reaction when a stone is fake. When the light remains green, that means the gem is a real diamond.

The StillCool diamond tester emits audible signs to assist with accurate testing.

This diamond tester has small and large switches at +/- 8 points. It makes a buzzing sound when it comes into contact with metal to increase the accuracy of readings.

This diamond tester includes the following additional items:

  • a testing platform
  • user manual
  • leather pouch

It’s powered by one DC 9V battery, which must be purchased separately.

Price: $14.99 on Amazon.com.

5. Btkuon 3in1 Diamond Gemstone Tester Selector II Gems Tool Test +60x LED Microscope Magnifier

Btkuon Diamond Tester

Image by Btkuon, via Amazon.com

The 3in1 Diamond Gemstone Tester Selector II is one of the best diamond testers that includes a microscope.

It also includes the following:

  • tweezer
  • farmar
  • jewelry pocket scale

Although this diamond tester is a 3 in 1 tool, it still conveniently fits in your pocket.

The LCD display is easy to read for more accurate results. The Btkuon diamond tester has an energy saving auto-off function. This is helpful in case you forget to turn it off.

In contrast to the previous items on this best diamond tester list, it’s powered by two AAA 1.5 LI batteries.

The 3in1 Diamond Gemstone Tester Selector II is easy to use, whether you’re a beginner or expert.

It turns the diamond indicator’s light green if the gem is a diamond. Also, the diamond tester also comes with a protective leather case so it lasts longer.

Price: $29.99 on Amazon.com.

6. HDE Jeweler Tool Kit Diamond Selector V2 Portable Tester + 45X Illuminated LED Loupe

HDE Diamond Selector V2 Portable Tester + 45X Illuminated LED Loupe

Image by HDE, via Amazon.com

Another good diamond tester that comes with a loupe is the HDE Jeweler Tool Kit Diamond Selector V2 portable Tester.

It comes with a 45X illuminated LED Loupe.

The tool accurately differentiates diamonds from other materials. Additionally, the tester comes with a small and large switch for diamond testing.

Similar to the other products on this best diamond tester list, it emits audible sounds to improve accuracy. The diamond indicator lights up if the stone is an authentic diamond.

Also, the HDE diamond tester is powered by one 9V battery, which isn’t included.

The 45X illuminated LED loupe is powered by a different set of batteries that are included with this product. The HDE Jeweler Tool Kit diamond Selector V2 Portable Tester + 45X Illuminated LED Loupe comes with a leather case.

This helps keep it protected when you need to bring it with you other places.

Price: $14.99 on Amazon.com.

Final Thoughts on the Best Diamond Tester

It’s important to look for diamond testers that have clear and easy-to-read displays. You don’t want a tester that’s difficult or confusing to read.

You want to know with certainty whether or not a gemstone is a real diamond.

Owning a high-quality diamond tester will give you peace of mind when shopping for diamonds. The six tools listed above are easy to use, accurate, and are powered by batteries that are easy to find.

Furthermore, most of the diamond testers on this list come with cases as well to protect them from damage.

 

Featured image: By LuckyStone, via Amazon.com

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