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Determining the authenticity of diamonds and gold is crucial for jewelers, collectors, and savvy shoppers. Investing in a reliable testing device ensures you can confidently assess the value and legitimacy of precious items. The right tester provides peace of mind and protects against costly mistakes in the world of fine jewelry.
ACCURATE DETECTION : Our professional diamond tester pen (a reliable gem tester) features a sophisticated sensor for precise gemstone identification (Diamonds/Moissanite: 9+ lights + beeps; Jade: 5-6 lights; Crystal/Glass: 5-7 lights). (Jewelry-Only...
STANDARD OPERATION : Insert battery (Gently press the wire and the cables to hold battery will secure it in place) → Power on → MUST preheat 30s (critical) → Adjust indicator to 4th mark (do not skip) → Hold back metal plate → Probe...
METAL DETECTION NOTE : Not for metal/gold or gold testing kit use – metal has similar thermal conductivity to diamonds (normal beeping, not a defect). Consistent with title "Jewelry-Only Detection"
PACKAGE CONTENTS : Diamond tester pen + user manual + 9V battery + testing platform. Read the manual first to maximize accuracy with your diamond detector
PRECAUTIONS : Avoid windy/cold conditions (15-25℃ recommended); Keep probe perpendicular to gemstone; Turn off power after using this diamond checker
SEAMLESS SHOPPING EXPERIENCE : Useful usage guidance for this diamond tester and gem tester is available via included resources. Note: Only valid for gemstone testing—non-diamond items cause incorrect readings
VIDEO GUIDE INCLUDED : Step-by-step operation & troubleshooting video covers preheating, calibration, perpendicular alignment, solves 90% of usage issues. Skipping any required steps may lead to inaccurate detection results
BATTERY INSTALLATION WARNING : Ensure the 9V battery is installed with correct polarity and properly seated in the battery compartment. Otherwise, the device may fail to power on. For details, please refer to the instruction manual
Complete Testing Kit – Includes jewelry test solutions, digital scale, diamond tester, touchstone, magnifier, files, and reference bars for evaluating gold, silver, platinum, and diamonds.
Digital Scale – Compact stainless-steel platform with 0.01 g accuracy, weighing modes for g/oz/dwt/ozt/ct/gn, and up to 100 g capacity.
Larger 15 ml Bottles – Each test solution bottle is 0.5 oz (15 ml), three times larger than many common 5 ml bottles available, providing more tests per bottle.
Diamond Tester & Accessories – Portable electronic tester with included sizing gauge and estimator for distinguishing diamonds from common simulants.
Magnifier & Files – 30X triplet loupe for inspecting fine details and a 10-piece diamond needle file set for preparing samples.
Reference Bars Included – Practice with a 5 gn silver bar and a 5 gm gold-plated bar to become familiar with testing reactions.
Neutralizer solution for cleaning test stone between use
[Power Upgrade] The HMKIS diamond tester offers two power supply options: Type-C and 9V Power (includes a 1m Type-C cable). Utilizing a Type-C power supply delivers a more stable and precise voltage output, thereby enhancing the accuracy and reliability...
[Rapid Assurance] The Professional Diamond Selector II swiftly verifies the authenticity of diamonds with precise accuracy. Designed for quick and secure testing, this diamond selector features an LCD display, LED indicator, and large/small switches for...
[Easy Use]The HMKIS Diamond Tester Pen is a user-friendly tool that eliminates the need for professional knowledge in diamond testing. With just a few simple steps, anyone can determine the authenticity of a diamond. By turning on the Diamond Tester Pen...
[Jewelers Loupe] The 60X LED Jewelers Loupe with batteries is a versatile tool that can be used for a wide range of applications. Whether you are examining gems, coins, antiques, stamps, conducting readings, inspections, jewelry appraisals, studying...
[Adjust Size]:We have to choose the diamond size before using the diamond tester.Otherwise we may get the incorrect result.
[Touch Panel]: We have to touch the panel on the back when testing. Othersize we will get a wrong result.
[Incorrect Contact]: When we have incorrect contact, this diamond tester pen will have a flashing OR it will turn off. When you testing metal,skin,or something else.
[Warm Notice]:Make sure to test according to the correct testing procedure, avoid using the diamond tester on unsuitable items(metal,skin,water and ect.), to ensure accurate testing results. Any improper operation may affect the accuracy of the test.
[Package include]:1 x Diamond Tester Pen, 1X 60XJewelers Loupe,1x 1M USB Cabel,1 x Testing Platform,1 x User Manual
This EASY to use genuine GTE Test kit will determine the karat value and purity of Gold, Silver, and Platinum Jewelry, scrap, bars, coins, and much more!
- 10K, 14K, 18K, 22K, Silver, and Platinum Test Bottles with 2''x2'' Test Stone with Rubber Backing for Non-slip Desktop Testing!
- GTE 30X Triplet Silver Eye Loupe Magnifier. Perfect for Inspecting small hard to read writings on jewelry/metals.
- GTE Premium Large Wooden Storage Box. This 9 Slotted wooden box is perfect for traveling and bringing to estate sales, thrift shops, and many other places! Essential for protecting and organizing your jewelry testing product.
- GTE Diamond Needle File (Used to shave down Gold/Silver/Platinum metal filings for testing.
[Power Upgrade] The HMKIS diamond tester offers two power supply options: Type-C and 9V Power (includes a 1m Type-C cable). Utilizing a Type-C power supply delivers a more stable and precise voltage output, thereby enhancing the accuracy and reliability...
[Easy Use] By turning on the Diamond Tester Pen detector, selecting the diamond size, and placing the tip of the tester on the gemstone, users can easily identify whether the stone is a genuine diamond or if it is made of glass, crystal, or cubic zirconia...
[Jewelers Loupe] The 60X LED Jewelers Loupe with batteries is a versatile tool that can be used for a wide range of applications. Whether you are examining gems, coins, antiques, stamps, conducting readings, inspections, jewelry appraisals, studying...
[Adjust Size]:We have to choose the diamond size before using the diamond tester.Otherwise we may get the incorrect result.
[Incorrect Contact]: When we have incorrect contact, this diamond tester pen will have a flashing OR it will turn off. When you testing metal,skin,or something else.
GEMSTONE-ONLY DETECTION: This diamond tester is EXCLUSIVELY for gemstone testing (diamond, moissanite, jade, crystal, glass). NEVER test metal, gold, silver, skin, water or any non-gem items—false beeps/lights are normal, not a product defect
MUST-FOLLOW OPERATION STEPS: Power on → Preheat 30s (critical step) → Calibrate to 4th mark → Touch back metal panel with bare hand → Probe gem at 90° perpendicular. Reset calibration before each test for accurate results, no professional skills...
WHY METAL/GOLD TRIGGERS BEEPS: Metal/gold share similar thermal conductivity with diamonds, which causes the diamond tester professional to give false prompts. This is the fundamental working principle of the thermal conductivity gem tester, not a quality...
CRITICAL MISTAKES TO AVOID: 1. Gloved operation (blocks conductivity, no response); 2. Single-hand use/untouched back panel (wrong results); 3. Tilted probe (invalid induction, no prompt); 4. Windy/cold environments (interferes with detection); 5. Skip...
OPTIMAL USAGE CONDITIONS: Stable performance at 10-35℃ (humidity ＜80%), windless environment recommended. Clean probe regularly for better efficiency; turn off power after use to save battery; battery temp ＜10℃ shortens usage time
ALL-IN-ONE READY-TO-USE KIT: Comes with diamond tester pen + 9V battery (included) + testing platform + user manual. No extra accessories needed—unbox and use instantly. Testing platform stabilizes gems to avoid shaking errors during detection
PORTABLE DESIGN FOR ALL USERS: Palm-sized and lightweight, fits in pocket/bag for on-site appraisal, jewelry store and home use. Equipped with gem size switch + audible/visual prompts, easy to operate for both beginners and professional gem lovers
[Fast and safe ]:Professional Diamond Selector II will indicate genuine diamond or fake.It is designed for quick, precise, and safe diamond testing.LCD display & LED indicator.Uses large / small switches for testing diamonds,Emits audible sounds to easily...
[Bare Hands Operation]:All the tests must be done by your bare hands. If you put on your gloves, the metal alert will not function since a normal moisture levelof your hands is necessary for operation.All test must be done by TWO hands, one for hold the...
[Beeping Upon Startup]:Ensure correct installation and adequate power in the test pen battery. Also, clean the test pen probe as maintaining its cleanliness can enhance testing efficacy.A beeping sound upon powering on signifies the need for...
[High-Frequency Sound when Testing Metal]:The high-frequency sound during metal testing is due to the test pen's operational principle, which relies on thermal conductivity to distinguish between diamonds and fake gemstones. Since metal possesses thermal...
[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...
[ Note]: The battery temperature is lower than 10 degrees Celsius, which seriously affects the use time Don't wear gloves，Don't detect metal Best to measure in no wind conditions，The operating temperature is within the range of 10-35 degrees Celsius...
[Package include]:Diamond tester is battery powered for convenience.Requires 1 standard 9v battery, which is included.Package include:1 x Diamond Tester,1 x Leather Pouch Case,1 x Testing Platform,1 x User Manual,1 x DC 9V battery.
Last update on 2026-07-16 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Jewelry Diamond & Gold Testers
Key Factors for Choosing a Jewelry Tester
When selecting a diamond and gold tester, consider the following crucial aspects:
Accuracy and Reliability: Look for devices with a proven track record of accurate readings. Some testers use thermal conductivity for diamonds and electrical conductivity for gold, while others may incorporate multiple testing methods for greater precision. Check user reviews for consistent positive feedback on accuracy.
Ease of Use and Portability: A user-friendly interface is essential, especially for beginners. Consider testers that are lightweight and compact if you plan to transport them frequently. Simple controls and clear display readouts enhance the overall user experience.
Material Compatibility: Ensure the tester is designed to identify both diamonds and various gold karats (e.g., 10K, 14K, 18K, 22K, 24K). Some advanced models may also offer testing capabilities for other gemstones or precious metals, providing broader utility.
Frequently Asked Questions
What is the primary function of a jewelry diamond and gold tester?
These devices are designed to help differentiate between real and imitation diamonds and to verify the karat purity of gold. They use various scientific principles to provide quick assessments of gemstone authenticity and metal content.
Are these testers suitable for professional jewelers and hobbyists alike?
Yes, there are models designed for both professional use, offering high precision and advanced features, and simpler, more affordable options for hobbyists or individuals who frequently buy and sell jewelry.
How do diamond testers work?
Most diamond testers rely on thermal conductivity, as diamonds are excellent heat conductors. They measure how quickly heat dissipates from the stone, distinguishing it from simulants that conduct heat differently.
Can gold testers differentiate between different karats of gold?
Many gold testers can identify different karat values by measuring the electrical conductivity of the metal. Higher karat gold generally has different electrical properties than lower karat gold or plated items.
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