The Best Gemstone Tester of 2021 – Top 10 and Rankings

If you’re looking for Gemstone Tester but don’t know which one is the best, we recommend the first out of 10 Gemstone Tester in this article. Check out how we decide after hours of researching and comparing dozens of items on the market.

Rank No. #1
Presidium Instruments Gem Tester II (PGT II) Now with Assisted Thermal Calibration (ATC) for Identifying Diamonds/Moissanites and Common Colored Gemstones
  • NOTE: The calibration may be affected during shipping. If you have issues, reach out to the seller.
  • INDUSTRIES MOST TRUSTED gemstone tester redesigned to be more compact, sturdy and portable.
  • THINNEST RETRACTABLE PROBE TIP: PGT II features the industry’s thinnest retractable probe tip.
  • VERSATILE AND RELIABLE: Consistent and reliable results every time. Identifies diamonds/moissanites.
  • SIMPLE & EASY TO USE: Clear and easy-to-read analog dial; Can differentiate 16 types of gemstones.
Rank No. #2
Presidium Duo Tester PDT Diamond Gemstone Tester
  • Retractable thermoelectric probe tip that ensures constant pressure between probe and gemstone
  • Industrys thinnest probe tip (0.6mm) for testing gemstones as small as 0.02ct
  • Large easy to read analog dial with 15 colored gemstones
  • Consistent and reliable results every time
  • Simple and easy to use
SaleRank No. #3
Professional Diamond Selector II, Gem Tester Pen Portable Electronic Diamond Tester Tool for Jewelry Jade Ruby Stone
  • This is a portable electronic device for distinguishing real diamonds from other simulated stones. It is designed for quick, precise, and safe diamond test.
  • An excellent tool kit for the diamond tester, suitable for handling any exposed or inlaid diamonds and gems, as well as other jewelry and precious metal items.
  • With voice instructions, audible sounds are emitted when the lights are on, so that you can easily distinguish between masonry and stone.
  • Small portable electronic devices can be put in any wallet or backpack, and the operation is simple. As long as the tip is perpendicular to the test masonry and the switch is pressed, the result can be obtained.
  • Package contents: 1 x diamond tester, 1 x leather case, 1 x test platform, 1 x user manual. This product uses dc9v battery (not including battery).
Rank No. #4
Presidium Instruments Gem Indicator (PGI) Handheld Tester for Identifying Diamonds and Common Colored Gemstones
  • INDUSTRIES MOST TRUSTED | The only handheld tester specifically for colored gemstones; Quick results in less than 6 seconds.
  • THINNEST RETRACTABLE PROBE TIP | Retractable thermoelectric probe tip that ensures constant pressure between probe and gemstone, for enhanced accuracy.
  • VERSATILE AND RELIABLE | Color input function to further separate gemstones for more precise results.
  • EASY TO READ | Results are on a clear digital LED screen; Tests an extended range of 31 different gemstones.
  • ERGONOMIC | Sleek chrome-brushed ergonomic grip; USB port for alternative power and handheld for convenience.
Rank No. #5
Alesuc Diamond Tester II V2 Selector Gemstone Jewelry Gems Tool with Case for Testing Novice and Zircon or Glass Diamond Selector II
  • Alesuc Diamond Tester is designed for quick, precise, and safe diamond testing; with LCD display & LED indicator
  • This gemstone testing equipment is not only a diamond tester, but also a multi gemstone tester. It can detect if a gemstone is real or fake, including: diamond, sapphire, ruby, crystal, agate, jadeite, and other precious stone of various sizes
  • If stone is Fake crystal, a simulant such as cubic zirconium ( CZ ), will be no reaction
  • Diamand tester is powered by DC 9V battery x 1 (Not Included)
  • Package Included: 1 * Diamond Tester(no battery included)
Rank No. #6
Compact Gemstone Tester, Diamond Tester, Fashionable for Professional Home
  • ◆【HIGH-PRECISION DIAMOND TESTER】◆ The professional diamond selector will display real diamonds or fake diamonds, LED lights and audio result indications, with strong sensitivity and accuracy.
  • ◆【PORTABLE DESIGN】◆ The operation of this diamond discriminator is simple and accurate. And the tester is light, compact and easy to carry, designed for fast, accurate and safe diamond testing. It is easy to calibrate gems of various sizes.
  • ◆【EASY TO USE】◆ This diamond tester has a highly compact design that can help you distinguish the difference between real diamonds and fake diamonds. The tester comes with a PU box and a small test platform for fixing loose stones, which is easy to use even for novices.
  • ◆【MULTIFUNCTIONAL】◆ The tester provides a highly compact design, which is very suitable for buying jewelry, buying/trading diamonds, selling real estate, auctions, etc. Can be used for fast, accurate and safe diamond testing.
  • ◆【WORRY-FREE AFTER-SALES SERVICE】◆ If there is any problem with your flashlight, or you are sure that it is not suitable for you, we will always be with you. Please contact us directly through Amazon. We will provide you with refunds and exchanges. Let you buy with confidence.
SaleRank No. #7
Diamond Tester Diamond Hardness Detector Observer Tool Gemstone Tester Identification Thermal Conductivity Diamond Tester Jewelry Detection Tool Jewelry Making Tool
  • ▶ Masonry tester: This is a test tool suitable for jewelry display or identification assistance. The thermal conductivity meter is based on the thermal conductivity of diamonds specially designed and manufactured to identify real diamond electronic instruments.
  • ▶ High accuracy: The diamond tester tool is a professional identification tool for diamond authenticity and imitation. Can detect the hardness of jadeite. When 7 lights are on, the thermal conductivity meter will test the measured object.
  • ▶ Easily check the authenticity of a diamond: It can help you distinguish whether a diamond is a real diamond or a fake diamond. Portable electronic device used to distinguish real diamonds from other simulated diamonds.
  • ▶ High-quality jewelry making tools: made of high-quality materials, environmentally friendly and durable. Suitable for jewelry display or identification, practical and convenient, and provide the best service for your jewelry design.
  • ▶ Ergonomic design: small size, easy to use and easy to store. The ergonomically designed handle is easy to hold. It is designed for fast, precise and safe diamond testing.
Rank No. #8
Presidium Instruments Gem Indicator (PGI) Handheld Tester for Identifying Diamonds and Common Colored Gemstones
  • INDUSTRIES MOST TRUSTED | The only handheld tester specifically for colored gemstones; Quick results in less than 6 seconds.
  • THINNEST RETRACTABLE PROBE TIP | Retractable thermoelectric probe tip that ensures constant pressure between probe and gemstone, for enhanced accuracy.
  • VERSATILE AND RELIABLE | Color input function to further separate gemstones for more precise results.
  • EASY TO READ | Results are on a clear digital LED screen; Tests an extended range of 31 different gemstones.
  • ERGONOMIC | Sleek chrome-brushed ergonomic grip; USB port for alternative power and handheld for convenience.
Rank No. #9
Jewerly Diamond Tester, Test Tool Set, LED Diamond Detector Selector, Gems Stone Hardness Test Tool Diamond Testers
  • High precision diamond tester: the professional diamond dial will indicate true or fake diamonds, LCD monitors and LED indicators. Compared to the second generation, its sensitivity and precision have been improved considerably.
  • Portable design: Diamond Selector II is equipped with a PU bag and a small test tray to hold loose stones. Designed for rapid, accurate and safe diamond testing. Through non-destructive testing, the operation is simple and precise. The tester is lightweight, compact (size of credit card) and easy to transport.
  • Small test platform: This tester is equipped with a PU housing and a small test platform for repairing loose stones. Simple calibration of precious stones of all sizes is easy for beginners.
  • Professional test: If the stone is a real diamond, a green indicator will be displayed. The metal alarm function emits a continuous beep when the user accidentally touches the metal instead of the stone.
  • Versatile: The tester offers a highly compact design that is ideal for buying jewelry, buying / exchanging diamonds, selling real estate, auctions, etc. The cost of Diamond Selector III is not even a fraction of the cost of diamonds, but it can help you feel better knowing that you are buying real diamonds instead of fakes.
Rank No. #10
Clina Jeweler Tester Tool, Professional Gemstone ldentification, Gem Refractometer, High Accuracy Professional Portable Diamond Tester Jewelry Gem Gemstone Selector Precision Tool RHG181 1.30-1.81
  • High quality: Quickly and accurately identify single and double gems. Low battery consumption and long life. Made of high quality ABS material, sturdy structure and long service life.
  • High precision and easy operation: The refractometer is highly accurate and easy to operate. Cost-effective, easy to operate without mistakes, is a stable diamond measuring instrument.
  • Specially designed: Designed to measure the refractive index of gemstones and solid materials. Let you measure more accurately. Set design, more economical and cost-effective, save costs for your jewelry making work.
  • Low cost and high return: This gem refractometer is a low-cost, lightweight measuring instrument used by jewelers and gem traders to measure polished gemstones with a refractive index ranging from 1.30 to 1.81 RI.
  • Compact and easy to carry: The RHG-181 gem refractometer is specially used to measure the refractive index of gems and solid materials. The size is about 13 * 6 * 3.5 cm/5.1 * 2.4 * 1.4 inches. It is characterized by its compactness and lightness, and is very popular in the jewelry industry.

How Do You Buy The Best Gemstone Tester of 2021?

Do you get stressed out thinking about shopping for a great Gemstone Tester? Do doubts keep creeping into your mind? We understand, because we’ve already gone through the whole process of researching Gemstone Tester, which is why we have assembled a comprehensive list of the greatest Gemstone Tester available in the current market. We’ve also come up with a list of questions that you probably have yourself.

We’ve done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for Gemstone Tester that you consider buying. Your questions might include the following:

  • Is it worth buying an Gemstone Tester?
  • What benefits are there with buying an Gemstone Tester?
  • What factors deserve consideration when shopping for an effective Gemstone Tester?
  • Why is it crucial to invest in any Gemstone Tester, much less the best one?
  • Which Gemstone Tester are good in the current market?
  • Where can you find information like this about Gemstone Tester?

We’re convinced that you likely have far more questions than just these regarding Gemstone Tester, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for Gemstone Tester, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible Gemstone Tester. Make sure that you are only using trustworthy and credible websites and sources.

We provide an Gemstone Tester buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information. How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available Gemstone Tester currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of Gemstone Tester has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features:What bells and whistles matter for an Gemstone Tester?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your Gemstone Tester.
  5. Customer Ratings: Number ratings grade Gemstone Tester objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their Gemstone Tester.
  7. Product Quality: You don’t always get what you pay for with an Gemstone Tester, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an Gemstone Tester is should be an indication of how long it will work out for you.

We always remember that maintaining Gemstone Tester information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding Gemstone Tester is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly! We’re here for you all the time. Contact us here. Or You can read more about us to see our vision.