--- product_id: 42075573 title: "Diamond Tester,High Accuracy Jewelry Diamond Tester Professional Diamond Tester Pen Jeweler Tool for Novice and Expert - Diamond Selector II 9V Battery Included(Black Diamond Testers)" brand: "hqdz" price: "¥5284" currency: JPY in_stock: true category: "Hqdz" url: https://www.desertcart.jp/products/42075573-diamond-tester-high-accuracy-jewelry-diamond-tester-professional-diamond-tester store_origin: JP region: Japan --- # 9V battery powered for instant use High-precision thermal conductivity detection Clear LCD & LED indicators for quick results Diamond Tester,High Accuracy Jewelry Diamond Tester Professional Diamond Tester Pen Jeweler Tool for Novice and Expert - Diamond Selector II 9V Battery Included(Black Diamond Testers) **Brand:** hqdz **Price:** ¥5284 **Availability:** ✅ In Stock ## Summary > 💎 Test Like a Pro, Shine Like a Boss ## Quick Answers - **What is this?** Diamond Tester,High Accuracy Jewelry Diamond Tester Professional Diamond Tester Pen Jeweler Tool for Novice and Expert - Diamond Selector II 9V Battery Included(Black Diamond Testers) by hqdz - **How much does it cost?** ¥5284 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/42075573-diamond-tester-high-accuracy-jewelry-diamond-tester-professional-diamond-tester) ## Best For - hqdz enthusiasts ## Why This Product - Trusted hqdz brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Bare-Handed Operation:** Designed for natural conductivity—test confidently without gloves for flawless accuracy. - • **Portable & Ready-to-Go:** Compact design with included 9V battery and leather pouch—perfect for on-the-spot appraisals anywhere. - • **User-Friendly Interface:** Intuitive LCD display and LED indicators make professional-grade testing effortless for novices and experts alike. - • **Thermal Conductivity Tech:** Advanced heat-based detection distinguishes real diamonds from fakes and common imitations with ease. - • **Instant Authenticity Check:** Fast, precise diamond verification with audible alerts—never second guess your gems again. ## Overview The Hqdz Diamond Tester Pen is a professional-grade, battery-powered tool that uses thermal conductivity to quickly and accurately distinguish genuine diamonds from fakes. Featuring an easy-to-read LCD and LED indicators, audible alerts, and a compact design with included 9V battery and leather pouch, it’s perfect for both novices and expert jewelers seeking reliable, on-the-go gemstone verification. ## Description Buy Diamond Tester,High Accuracy Jewelry Diamond Tester Professional Diamond Tester Pen Jeweler Tool for Novice and Expert - Diamond Selector II 9V Battery Included(Black Diamond Testers): Diamond Testers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases ## Features - [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 differentiate the readings. - [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 diamond and one for the diamond tester. As for the hand which hold diamond tester, you have to touch the electricity conductive panel on the back of the unit.If you test the diamond just by one hand, you will get a wrong result. - [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 initialization settings. Consult the table on the rear of the machine for the specific initialization settings considering the diamond's temperature and size. Adjust the initial number of illuminated lights by rotating the knob (the default setting is to have 4 lights illuminated at room temperature). - [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 conductivity similar to diamonds, it generates a high-frequency sound during testing. - [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. - [ 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, and the humidity is below 80% When testing diamond, your right index finger must keep touching the metal panel on the back of the tester. Please turn off the power after the test to save power. - [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. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B06Y2MT175 | | Best Sellers Rank | #3,253 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #2 in Jewelry Diamond Testers | | Brand Name | Hqdz | | Color | Black | | Customer Reviews | 4.1 4.1 out of 5 stars (7,582) | | Included Components | Batteries included | | Item Dimensions | 3.94 x 1.57 x 1.18 inches | | Item Weight | 5.28 ounces | | Lower Temperature Rating | 10 °C | | Manufacturer | Hqdz | | Measurement Type | Thermal Conductivity | | Minimum Operating Voltage | 9 volts | | Model | Hqdz | | Number of Items | 1 | | Part Number | Hqdz | | Power Source | Battery Powered | | Style Name | 1.High Quality Accuracy Ease of use 2.Presidium Instruments Gem Indicator (PGI) Handheld Tester for Identifying Diamonds and Common Colored Gemstones 3. Professional Diamond Selector for Novice and Expert&Jewelers,Thermal Conductivity Meter 4.Gems, Jewelry, Diamonds, jewelry appraisal, gemstones, rocks,watches, | | UPC | 612957119690 | | Unit Count | 1 Count | | Upper Temperature Rating | 35 °C | ## Product Details - **Brand:** Hqdz - **Color:** Black - **Item Weight:** 5.28 ounces - **Power Source:** Battery Powered ## Images ![Diamond Tester,High Accuracy Jewelry Diamond Tester Professional Diamond Tester Pen Jeweler Tool for Novice and Expert - Diamond Selector II 9V Battery Included(Black Diamond Testers) - Image 1](https://m.media-amazon.com/images/I/51zV2YIJ0QL.jpg) ![Diamond Tester,High Accuracy Jewelry Diamond Tester Professional Diamond Tester Pen Jeweler Tool for Novice and Expert - Diamond Selector II 9V Battery Included(Black Diamond Testers) - Image 2](https://m.media-amazon.com/images/I/41gXTkztwbL.jpg) ![Diamond Tester,High Accuracy Jewelry Diamond Tester Professional Diamond Tester Pen Jeweler Tool for Novice and Expert - Diamond Selector II 9V Battery Included(Black Diamond Testers) - Image 3](https://m.media-amazon.com/images/I/41Jp4KVDT5L.jpg) ![Diamond Tester,High Accuracy Jewelry Diamond Tester Professional Diamond Tester Pen Jeweler Tool for Novice and Expert - Diamond Selector II 9V Battery Included(Black Diamond Testers) - Image 4](https://m.media-amazon.com/images/I/31-hC8c6ktL.jpg) ![Diamond Tester,High Accuracy Jewelry Diamond Tester Professional Diamond Tester Pen Jeweler Tool for Novice and Expert - Diamond Selector II 9V Battery Included(Black Diamond Testers) - Image 5](https://m.media-amazon.com/images/I/71ClMjTPJFL.jpg) ## Questions & Answers **Q: What is the small black thing inside the package that is shaped like the capital letter E** A: Mine came with a thing to hold loose diamonds...is this what you’re talking about? **Q: Does this unit test uncut stones?** A: How To Test Diamond Turn on the switch. Make sure only 1 light is lighting up on the scale. Wait few seconds for the probe to heat up until Lamp on ready OK. Turn on the lights numbers corresponding to the indoor temperature and diamond weight. If don't know. Set 4 lights is lighting up on the scale. Start test diamond, no need to adjust the switch switch. Use the diamond discriminator probe to make 90-degree contact with the measured object, and observe the indicator light change. It needs a little bit of force to stop it on the diamond surface and make full contact. If unsuccessful, please repeat the second step. Hqdz Diamond Tester Pen Test result analysis If lights >= 9 and have sounds, it is true diamond. If lights < 9 and no sounds, it is not diamond. If lights is 7 or 8, it is true crystal. If lights is 6 or 7, it is true jade. If lights is 4 or 5, it is glass. Don't test metal，Don't wear gloves. In a low temperature environment, the battery discharge is weakened. Please raise the battery temperature to above 10 degrees Celsius. The test takes a few minutes, please turn off the power after the test is complete. **Q: Why does it go to red and beep on a chain I believe it’s gold . It’s the same beep noise as it sounds with a diamond. Not the weird sound on metal** A: How To Test Diamond Turn on the switch. Make sure only 1 light is lighting up on the scale. Wait few seconds for the probe to heat up until Lamp on ready OK. Turn on the lights numbers corresponding to the indoor temperature and diamond weight. If don't know. Set 4 lights is lighting up on the scale. Start test diamond, no need to adjust the switch switch. Use the diamond discriminator probe to make 90-degree contact with the measured object, and observe the indicator light change. It needs a little bit of force to stop it on the diamond surface and make full contact. If unsuccessful, please repeat the second step. Hqdz Diamond Tester Pen Test result analysis If lights >= 9 and have sounds, it is true diamond. If lights < 9 and no sounds, it is not diamond. If lights is 7 or 8, it is true crystal. If lights is 6 or 7, it is true jade. If lights is 4 or 5, it is glass. Don't test metal，Don't wear gloves. In a low temperature environment, the battery discharge is weakened. Please raise the battery temperature to above 10 degrees Celsius. The test takes a few minutes, please turn off the power after the test is complete. **Q: Will it beep for lab grown diamond?** A: it should but if it doesn't beep then take it to a jeweler to have them check it out. plus you can go online and see ## Frequently Bought Together - High Accuracy Professional Diamond Tester Pen Jeweler Tool for Novice and Expert - Diamond Selector II 9V Battery Included(Black) - Envistia Mall Keychain Magnet for Testing Gold, Silver, Brass, Precious Metal & Jewelry, Non-ferrous metal verification --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/42075573-diamond-tester-high-accuracy-jewelry-diamond-tester-professional-diamond-tester](https://www.desertcart.jp/products/42075573-diamond-tester-high-accuracy-jewelry-diamond-tester-professional-diamond-tester) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-21*