Best Presidium Diamond Testers in 2026

[Easy to Use]: Real Diamond will Emits sounds and lights >=9.

[Intuitive Design]: Fake crystal, such as cubic zirconium ( CZ ), crystal, glass will be no sounds and lights <9.

[fast and safe ]: This diamond selector tester designed for quick, precise, and safe diamond testing. No harm to diamonds.

[Fast and safe ]:Professional Diamond Selector II will indicate genuine diamond or fake.It is designed for quick, precise, and safe diamond testing.

[Intuitive Design]:LCD display & LED indicator.Uses large / small switches for testing diamonds,Emits audible sounds to easily differentiate the readings.

[Simple to Use]:Hqdz Diamond Tester Pen is simple to operate to get results, professional(s) are not required. Simply turn on our Diamond Tester Pen detector; place the tip of the Diamond Tester on the gem stone (lightly pressed is sufficient) and If the stone is fake, crystal or cubic zirconia, the tester will not beep.

✔【Intuitive Design】Molo Diamond Tester Pen comes with LED lights and audio indication. During a test, if the stone tested is a diamond, the LED lights will light up as the stone passes each test conducted by the Diamond detector. Once our Diamond Tester Pen has completed all of its tests, the pen will make a beep sound as well as show a row of fully lite LED lights.

✔【Fast Results】Molo’s Diamond Tester Pen is design to deliver fast, accurate results. You will be able to know if something is fake in a matter of seconds.

✔【Simple to Use】Molo Diamond Tester Pen is simple to operate to get results, professional(s) are not required. Simply turn on our Diamond Tester Pen detector; place the tip of the Diamond Tester on the gem stone (lightly pressed is sufficient) and If the stone is fake, crystal or cubic zirconia, the tester will not beep. To determine the clarity of a diamond use 60X LED lighted Loupe, magnifying glasses.

✅【Intuitive Design】 Our diamond tester features an LCD display and LED indicator make it easy to read your precise testing results.

✅【Effortless Testing】 No need for a professional - the StillCool Diamond Tester Pen is easy to operate. Just turn it on, lightly press the tip to the gemstone, and wait for the beep to know if it's real or fake.

✅【If it's Real Diamond】The professional Diamond Tester will lighted up over 9 and emits audible sounds. No reaction means the stone is a fake crystal or simulant like cubic zirconium (CZ).

Verifies authenticity of diamonds instantly

Thin probe tip (.6mm) for testing diamonds as small as .02ct

Retractable thermoelectric probe tip for enhanced accuracy that ensures constant pressure between probe and gemstone

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.

✔●Professional Diamond Selector II will indicate genuine diamond or fake,LCD display & LED indicator.

✔●It is designed for quick, precise, and safe diamond testing.Emits audible sounds to easily differentiate the readings.

✔●Portable electronic device for distinguishing real diamonds from other simulated stones.

Real Diamond will Emits sounds and lights >=9.

This diamond selector tester designed for quick, precise, and safe diamond testing.

Fake crystal, such as cubic zirconium ( CZ ), crystal, glass will be no sounds and lights <9.

Easily Operated: If the lights move rapidly lighting up as they go, and there is a steady beep, and the lights are greater than or equal to 9. You know you have a real diamond. There would be no beep sounds and the diamond tester will not light up from green to red for cubic zirconium, crystal, and glass, and lights are less than 9

Fast Results: Designed for rapid, accurate, and safe diamond testing. Through non-destructive testing, the operation is simple and precise. Professionals are not required.

Upgraded high precision diamond selector ll: The upgraded diamond tester is more profession and precision. Quick indicate genuine diamond or fake

✔【Intuitive Design】Hqdz Diamond Tester Pen comes with LED lights and audio indication. During a test, if the stone tested is a diamond, the LED lights will light up as the stone passes each test conducted by the Diamond detector. Once our Diamond Tester Pen has completed all of its tests, the pen will make a beep sound as well as show a row of fully lite LED lights.

✔【Simple to Use】Hqdz Diamond Tester Pen is simple to operate to get results, professional(s) are not required. Simply turn on our Diamond Tester Pen detector; place the tip of the Diamond Tester on the gem stone (lightly pressed is sufficient) and If the stone is fake, crystal or cubic zirconia, the tester will not beep. To determine the clarity of a diamond use 60X LED lighted Loupe, magnifying glasses.

✔【Fast Results】Hqdz’s Diamond Tester Pen is design to deliver fast, accurate results. You will be able to know if something is fake in a matter of seconds.

INCLUDED ASSISTED THERMAL CALIBRATION | Now easily self calibrate your device to your testing environment

INDUSTRIES MOST TRUSTED | Gemstone tester redesigned to be more compact, sturdy and portable

THINNEST RETRACTABLE PROBE TIP I PGT II features the industry’s thinnest retractable probe tip

【Non-destructive Testing】 This diamond tester is specially designed for true and false gemstone testing, not only fast and accurate, but also safe, used to distinguish real diamonds from other imitation stones, without adverse effects on gemstones, suitable for: masonry, crystal, agate, red Sapphire, Emerald and more, it is a great tool to test your jewelry

【EASE OF USE】 The intuitive display design of the LCD display and LED indicator light makes the operation of the diamond checker tool easy. The probe and the object to be tested must be at a 90-degree angle, and the authenticity of the gemstone can be quickly identified according to the sound and reading (such as cubic zirconium (CZ)) Such imitations will not react when detected)

【COMPACT SIZE FOR EASY PORTABILITY】 Our high accuracy diamond tester measures about 6.3 x 1.57 x 0.87 inches, it is small and portable, it is light in weight, it can be put into any handbag or backpack, and it will not put too much burden on you when using it

IMPORTANT TO NOTE: This product needs to be calibrated prior to use. If you experience issues with calibration, please reach out to the seller for assistance prior to returning the item.

EASY TO USE DESIGN: Ergonomic handheld design with a rubberized anti-slip grip for easy handling. Light and portable with a convenient carrying case.

THINNEST RETRACTABLE PROBE TIP: Retractable probe tip that ensures consistent pressure against the gemstone during testing for more reliable results. With the industry’s thinnest probe tip size of 0.6mm, the PMuT III tests colorless diamonds as small as 0.02ct.

Size of Diamond Tester Pen: The gemstone tester pen dimensions are 6.6 Inches long, 1.6 Inches wide, and 0.8 Inches thick. The portable diamond tester gadget is lightweight, matched with a practical carrying case.

Detection Way: 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, a simulant such as cubic zirconia does not have any reaction.

Result Indicator of Diamond Reader: With diamond gem tester 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.

Low power usage and low battery indicator make sure you always have power when you need it

Instant recovery time in between tests

Uses thermal conductivity tests to detect diamond and simulants

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 detection,Retractable probe tip with enhanced durability

Professional Diamond Selector II will indicate genuine diamond or fake，It is designed for quick, precise, and safe diamond testing.

Uses large / small switches for testing diamonds，Emits audible sounds to easily differentiate the readings,To determine the clarity of a diamond use 30X Magnifying,

Diamond Tester Pen and 30X Magnifying, each comes with its own convenient carrying cases,Portable electronic device for distinguishing real diamonds from other simulated stones.If stone is Fake crystal, a simulant such as cubic zirconium ( CZ ), will be no reaction.

【DIAMOND TESTER】 This is a diamond selector with an accurate and reliable reading.

【QUALITY GUARANTEE】 the best quality. Our brand is dedicated to providing high quality products. We have confidence in our products and offer after sales support. If you have problems with product quality, contact us.

【SCOPE OF APPLICATION】 Moissanite Tester is an instrument that combines with the Diamond Selector II. It is only used for the distinction of colorless Moissanite.

Tests all colors of gold from 6K to 24K and tests platinum

Powered by included 9V alkaline battery or 100V-240V AC adaptor

Alphanumeric LCD display shows both karat value and gold percentage

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.In order to let you carry it better, we have a special leather case storage bag! Suitable for carrying when going out for appraisal

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: 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.

Audible and readable alarms: emits audible sounds to easily distinguish between readings, portable electronic devices, to distinguish between true diamonds and other simulated gems. The real diamond is indicated by a red LED and a sound. The results of the tests are accurate, reliable and easy to read. If the stone is a pseudo-crystal, a simulation object such as cubic zirconia (CZ) will not react.

INDUSTRY’S THINNEST TIP: Detects colorless diamonds, moissanites, simulants instantly with metal alert. Accurate testing on colorless diamonds as small as 0.02 carats and diamond melees as small as 0.01 carats with micro probe purchased separately

DYNAMIC MICRO LED DISPLAY: Bright LED display provides clear and precise results. Automatic power off after 2 minutes of inactivity.

SLEEK ERGONOMIC STYLING: Sleek light and portable design with chrome-brushed tip and ergonomic grip provides an easy and comfortable hand hold. Power with 3 x AAA batteries or included USB cable and adapter

ALL-IN-ONE 14K GOLD AND SILVER TESTING & APPRAISAL KIT

FUN, FAST, AND ACCURATE! DETERMINES THE KARAT OF GOLD AND SILVER JEWELRY IN SECONDS!

AUTHENTIC *LARGE* GTE 2''x 4'' JEWELRY TOUCHSTONE FOR SAFE TESTING THAT WON'T DAMAGE YOUR JEWELRY

ALL-IN-ONE GOLD AND SILVER TESTING & APPRAISAL KIT

FUN, FAST, AND ACCURATE! DETERMINES THE KARAT OF GOLD AND SILVER JEWELRY IN SECONDS!

2 AUTHENTIC *LARGE* GTE 2''x 4'' JEWELRY TOUCHSTONES FOR SAFE TESTING THAT WON'T DAMAGE YOUR JEWELRY

ALL-IN-ONE GOLD, SILVER, PLATINUM, & DIAMOND JEWELRY TESTING & APPRAISAL KIT

FUN, FAST, AND ACCURATE! DETERMINES THE KARAT OF GOLD, SILVER, AND PLATINUM JEWELRY IN SECONDS!

AUTHENTIC GTE 2''x 2'' JEWELRY TOUCHSTONE FOR SAFE TESTING THAT WON'T DAMAGE YOUR JEWELRY