Best Pen Gold Testers in 2026

✔【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).

This is a portable electronic device for distinguishing real diamonds from other simulated stones. It is designed for quick, precise, and safe diamond tests.

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.

The diamond detector with voice instructions and audible sounds are emitted when the lights are on so that you can easily distinguish between masonry and stone.

[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.

[Supporting battery]: Supporting alkaline mercury-free environmentally friendly high-performance battery

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

World’s most user-friendly, best performing handheld electronic gold tester with unmatched accuracy

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

Immediate test results – no waiting between tests

【More Safety】CE CAT.II300V RoHS Certificate. No gloves are recommended during the test, Testing AC voltage needs the human body and ground wire to form a circuit. No Electric Shock Risk, No Dangerous, More Accurate Readings. The current flowing through the human body is less than 0.1uA. (Min current the human body sense：1mA). The internal circuit of the Voltage Pen is connected in series with a large resistor, which will burn out when the current is too large, and the circuit will disconnect.

【Alarm Mode】The buzzer and indicator light will be triggered when voltage is detected. High-frequency beeps means high voltage and live wire are detected. Low-frequency beeps sound mean low voltage and null wire are detected.

【Measurable Voltage】Equipped with a sturdy metal NCV probe for testing AC voltage; the test probe touches the conductor with AC voltage, and the voltage reading will show on display. To obtain more accurate values, it is recommended not to wear gloves when using.

Complete tool for diamonds: the package comes with 1 piece of Jewelry tester and 1 piece of Jewelry loupe, 2 pieces in total, which are complete and practical for you to test or observe diamonds, bringing you a good using experience

Clear screen design: these high accuracy diamond testers are designed with a clear screen, so you can get the useful data quickly; The item you are testing will be a true diamond when the data is above 9, and a true emerald crystal agate when the data is 7, saving your time to recognize

Multiple uses: the gold testing kit is suitable for testing various items, such as diamonds, jades, emeralds, crystals, agates, gems and so on, making it possible for you to distinguish and observe them clearly and easily

💎Professional Diamond Selector II will indicate genuine diamond or fake

💎It is designed for quick, precise, and safe diamond testing.

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

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 the number of lights equals or exceeds 9, and it beeps, it means the diamond is true. * If the lights is about 9 and it beeps, it means the sapphire is true. * If the number is 6.5-7, it means the agate is true. * If the number is 7-8 , it means the crystal is true. * If the number is 6-7, it means the jade is true.

Before Test: 1. Put the battery in the tester. 2. Take off the probe cap. 3. Turn on the switch. 4. Make sure only one light light up on the scale. 5. Make sure the " ready lamp" light on. 6. (If test diamond, you then need to turn on the lights number corresponding to the indoor temperature and diamond weight.). 7. (If test other gems, you'd better calibrate the probe, method: by placing the probe vertically on a glass, then adjusting the light to 5, then test the gems.)

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.

【DIAMOND TESTER】 Jewelry Identification Tool is a diamond selector with accurate and reliable reading, but also a multi-gem tester. Made of quality material, which is eco-friendly and durable to use. which is eco-friendly and durable to use.

【EASY TO USE】 A new portable diamond observation tool, you can use infrared irradiation in diamond to evaluate the diamond.Jewelry Identification Tool In accordance suitable for outdoor environment and adverse weather conditions, suitable for jewelry display or identification assistance.

【EASY TO TAKE】 The compact size is easy to use and portable to store. Jewelry Identification Tool Suitable for jewelry display or identification assistance. The handle of ergonomic design is convenient to grip.

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.

Tests 10k, 14k, 18k, 22k, 24k, and Platinum

Battery Operated and Includes AA Battery

No Messy Gels or Liquids

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

[Wire Piercing Probe Clip] Red/Black; 1KV CATIII 10A; It can easily puncture the cable sheath for testing without cutting the cable sheath. It can be widely used for the non-destructive cable testing in industrial, electronics, home and automotive.

[Insulation Piercing Clip Test Probe] PA-insulated, Grip the conductor to provide a more secure, hands-free connection than probe tips connections that may need to be left in place. Come with extra 8pcs interchangeable pen tips (4pcs nickel-plated copper and 4pcs gold-plated copper -- small enough to access the tightest of SMD equipment).

[Test Extension Lead] 1KV CATIII 20A; 3ft/39 inch; Both ends of this test leads are injection molded standard 4mm banana plugs. Straight plug to right angle plug. Perfect for testing with multimeters, clamp meters and other probes which has standard 4mm banana jack. It can connect a compatible electrical test meter to a device for testing.

[HOW TO SOLVE BEEP PROBLEM]: For 1st use, please set four lights to illuminate on the scale otherwise it will keep beeping when testing

[WIDELY USE]:The diamond tester pen can selecter diamond, glass, sapphire, ruby, crystal, agate. But DIDNOT WORK ON METAL!

[TEST REAL DIAMOND]: For Real Diamond，diamond tetster will beeping and lights >=9

♠Professional Diamond Mosang stone Surveymeter will show real diamonds or fakes，Use the big/small switch to test diamonds，Makes an audible sound to easily distinguish readings.

♠It is designed for quick, precise, and safe diamond testing.Harmless to diamonds.

♠Equipped with light to test flourescent reaction of stones.Flexible calibration with multi Level Volume to match different sizes of stones.

This diamond tester uses probe heating chip to detect the authenticity of diamonds, which has high accuracy and quick response speed.

You can easily differentiate the results by the 3-color indicator, and this diamond tester is lightweight and compact in size, which is portable and easy to operate.

Made of high-quality ABS and metal, this diamond tester is durable.

【Complete Tool for Diamonds】Diamond tester package comes with 1 x Jewelry tester, 1 x Jewelry loupe, 1 x leather pouch case for pen, 1 x leather pouch case for Microscope, 1 x 9V battery, 1 x Testing Platform, 1 x Tweezers, 7pieces in total, which are complete and practical for you to test or observe diamonds, bringing you a good using experience.

【Clear Screen Design】These high accuracy diamond testers are designed with a clear screen, so you can get the useful data quickly; The item you are testing will be a true diamond when the data is above 9, and a true emerald crystal agate when the data is 7, you will be able to know in a few seconds whether an item is fake or not, saving your time to recognize.

【Multipurpose】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, such as diamonds, jades, emeralds, crystals, agates, gems and so on, making it possible for you to distinguish and observe them clearly and easily.

Fast and accurate: The Diamond Tester Pen is equipped with an LED light and audio indication. During the test, the LED lights up if the stone being tested is a diamond, and once our Diamond Tester Pen has completed all tests, the pen will beep as well as display a row of fully lit LEDs.

Easy to use: Simply turn on our diamond tester pen detector; place the tip of the diamond tester over the stone (a gentle press is sufficient) and if the stone is fake, crystal or cubic zirconia, the tester will not beep. To determine the clarity of the diamond, use a Loupe, magnifying glass with 60X LED illumination.

Multi-functional testing: This gemstone testing device is not only a diamond tester, but also a multi-gem tester. It can detect the authenticity of gemstones including: diamonds, sapphires, rubies, crystals, onyx, emeralds and other gemstones of all sizes.

Suitable for jewelry display or identification assistance.

The torch can directly display the light color effect under the tester of diamond and then to evaluate the quality of diamond.

Made of quality material, which is eco-friendly and durable to use.

World’s most user-friendly, best performing handheld electronic gold tester with unmatched accuracy

Tests all colors of gold from 6k - 24k and Platinum

Increased accuracy when testing high-karat gold

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 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

Professional multi-functional jewelry tester that can quickly, accurately and safely screen out real and fake jewelry for you with high accuracy and reliable results.

Easy to use, just turn on the tester switch, the probe vertical contact jewelry can be automatically detected, no professional experience, beginners can also quickly master.

Equipped with LED indicators, which can visually indicate the current thermal conductivity of the jewelry and distinguish it by color, helping you to quickly determine the authenticity of the jewelry.