Perfect Combination: the package includes 1 piece of Jewelry tester and 2 piece of Jewelry loupe, which are complete and practical for you to test or observe diamonds, bringing you a good using experience.

Clear Screen & Audio Instruction Design: these high accuracy diamond testers are designed with a clear screen, so you can get the useful data quickly. The jewelry diamond tester is equipped with LED lights and audio instructions. As long as the tip is perpendicular to the test masonry and the switch is pressed, the result can be obtained.

Dual Function: The diamond tester can test the authenticity of diamonds(above 9), and can also test the hardness of finished jade crystal agate with a hardness value between 5-9.

Magnifying Glass Accessory: 2 pieces magnifying glass are provided, one is equipped with 60X and LED illumination. The other features 2 Lenses(30X 60X) and 2 LED lights. Clear magnification effect, refine surface, comfortable and natural to use. They can be applied for gems, jewelry, coins, stamps, watches, hobbies, models and observing other items you want.

Wide Application: Diamond test pen can be used for gems, coins, antiques, stamps, reading, inspection, etc. Diamond tester pen is designed for fast, precise and safe diamond testing.

This gemstone testing equipment is not only a diamond tester, but also a gemstone tester. It can detect whether a gemstone is real or fake, including: diamond, sapphire, ruby, crystal, agate, jadeite and other gemstones of various sizes.

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

Before testing: 1. Insert the battery. 2. Remove the probe cover. 3. Turn on 4. Make sure only one light on the scale turns on. 5. Make sure the "lamp ready" light is on. 6. (If you test the diamond, turn on the number of lights corresponding to the interior temperature and weight of the diamond.) 7. (If you test other gems, it is better to calibrate the probe, method: place the probe vertically on the glass, then adjust the light to 5, then test the gems)

★ Notice: *No matter what gemstone you are testing, the probe needle and the tested object should be at a 90° angle. *When testing diamond, your right index finger should keep touching the metal panel on the back of the tester, while you do not touch the panel if testing other gemstones. *Do not test any metal. * Do not use a glove.

Product size: 16*4*2.2cm. Weight: 100g. Power required: 1 x 9V battery (not included). If you have any problems with the tests, please contact us, we would love to help you.

【Diamond Tester Professional】Diamond tester is a precision electronic instrument designed and manufactured specifically for identifying the authenticity of diamonds based on their thermal conductivity. Genuine diamonds will make the tester emit sound and LED light>=9. Fake crystals such as cubic zirconia (CZ), glass, etc. will be silent and LED lights will be <9.

【Easy Test】The operation of tester pen is very simple and does not require professional personnel to complete. Simply install the 9V battery (not included), open it, gently press the tip vertically onto the gemstone, and wait for the beep to know if the gemstone is real or fake.

【If It's A Real Diamond】Diamond tester professional will light up 9 LED lights and emit audible sound. No response means that this stone is a fake crystal or a simulation similar to cubic zirconium (CZ). It can also be used for the detection of gemstones such as jade, crystal, agate, and jadeite.

【Quick and Secure】Fast, precise, and safe, ensuring that diamonds will not be damaged during the testing process. Can provide accurate results every time. Note: Please ensure that the ambient temperature during use is 5 ℃ -35 ℃ (41 ℉ -95 ℉), the relative humidity of the air is less than 80%, and the gemstone being tested must be clean, dry, and at room temperature

【Easy to Carry】The Diamond tester is powered by a standard 9V battery (not included), with a compact size of 160 * 40 * 22mm and a lightweight weight of 130g, making it easy to carry around. It is an essential device for purchasing or trading diamond jewelry. Package: 1 X Diamond Test Pen, 1 X Leather Case, 1 X Testing Platform.

Multi Gemstone Testing Accuracy – This portable electronic diamond tester pen works not only as a diamond tester but also as a gemstone detector. Suitable for diamond, moissanite, jade, ruby, sapphire, agate, crystal and other precious stones, providing reliable results for jewellers, collectors and hobbyists

Professional Detection Features – The moissan diamond tester pen uses an easy-to-read LED scale and audible beeps to identify gemstones with precision. Diamond, sapphire, jade and crystal can be checked quickly, ensuring accurate testing of authenticity whether for personal use or professional jewellery evaluation

Portable and Lightweight Design – Measuring just 16 × 4 × 2.2 cm and weighing only 100 g, this compact diamond tester for jewellery is ideal for carrying in a pocket or toolkit. The tester pen ensures you always have a practical gemstone testing device at hand when travelling, buying, selling or appraising jewellery

Simple and Convenient to Use – Powered by 1 × 9V battery (not included), this diamond tester pen is easy to operate. Clear lights indicate calibration readiness, while the ergonomic design allows for comfortable handling during testing. The gemstone tester requires no complex setup and offers instant usability

Safe Testing with Clear Instructions – For best results, the gemstone probe should be placed vertically at 90° on the stone being tested. When testing diamonds, touch the metal panel with your index finger. Avoid gloves or metal interference. Designed for long-lasting performance with correct handling and care

Precision Performance: Features an advanced imported chip for accurate readings, quick response time, and reliable performance in temperatures between 5–35°C with humidity below 80%.

Non-Destructive Testing: Designed for safe use, the tester analyzes gemstones without causing damage, preserving the quality and integrity of your jewelry pieces.

Smart Indicator Lighting: Equipped with a bright LED scale that lights up according to the stone's authenticity-nine or more lights and a beep confirm a real diamond.

Portable and User-Friendly: Lightweight, compact, and battery-powered, this handheld device fits easily into your pocket, ideal for jewelers, collectors, and field inspections.

Advanced Thermal Conductivity: Utilizes professional-grade thermal conductivity measurement to accurately identify genuine diamonds based on their unique heat transfer properties.

This High-Accuracy Diamond Tester can accurately detect multi gemstones like diamond, sapphire, crystal, agate and jadeite.

Consists of a durable plastic housing, LED lights and an audio indicator, durable and lightweight.

Operating Environment: 5℃ ~ 35℃, Relative Humidity: ＜80. Power Supply: 9V Battery (not included).

Make sure the tester probe needle is at a 90-degree angle with the tested object. Meanwhile, the right index finger must touch the metal panel on the back of the tester.

* Do Not test any metal. * Do Not wear gloves. A user manual is included for hassle-free operation.

Gemstone Identification: This diamond test pen uses thermal conductivity technology to provide highly accurate readings, helping to easily distinguish between real diamonds, fa-ke diamonds and other gemstones.

Easy to Use: The compact and lightweight design makes it highly portable and suitable for gemstone testing anytime, anywhere. Simple operation with just the press of a button, it is perfect for jewelers, pawn shops and gemstone enthusiasts.

Specifications: Material: ABS， Test method: Thermal conductivity ，Magnification: 30x, built-in LED lighting，Indicator: LED indicator and au-dio alarm system，Power supply: 2 AAA batteries，Dimensions: 18.60x6x3.50cm，Weight: 155g

Au-dio Alarm: Equipped with a clear LED indicator and au-dio alarm system, it signals the user when the test is complete, ensuring efficient and error-free diamond testing.

Application: Suitable for testing diamonds, moissanite, sapphire and other gemstones, this tester is a must-have tool for jewelers, gemstone collectors and jewelry restoration professionals.

diamonds. The scale is clear and the prompt light is colourful, helping you to judge the authenticity of diamonds at a glance.

💎【Comes with Placement Platform】: The tester comes with a small 4-hole test platform for placing loose stones. It allows for simple calibration of gemstones of all sizes and is suitable even for novices.

💎【Portable Design】The specification of this test pen is 15cm*5cm*3cm, light weight and small size, which can be easily carried to any working scene. Equipped with LED indicator, the operation is simple and precise.

💎【Multifunctional】：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.

💎【Notice】No matter what gemstone you are testing, the probe needle and the tested object must be at a 90° angle. Do Not test any metal.