--- product_id: 719086838 title: "Diamond Tester Pen, Professional Jewelry Diamond Selector Diamond Selector for Novice and Expert (Non-Rechargeable)" brand: "hmkis" price: "68.97 DT" currency: TND in_stock: true reviews_count: 8 category: "Hmkis" url: https://www.desertcart.tn/products/719086838-diamond-tester-pen-professional-jewelry-diamond-selector-diamond-selector-novice store_origin: TN region: Tunisia --- # High accuracy thermal conductivity sensor LCD + LED indicators for instant clarity Dual power: Type-C & 9V for stable voltage Diamond Tester Pen, Professional Jewelry Diamond Selector Diamond Selector for Novice and Expert (Non-Rechargeable) **Brand:** hmkis **Price:** 68.97 DT **Availability:** ✅ In Stock ## Summary > 💎 Test like a pro, spot the sparkle instantly! ## Quick Answers - **What is this?** Diamond Tester Pen, Professional Jewelry Diamond Selector Diamond Selector for Novice and Expert (Non-Rechargeable) by hmkis - **How much does it cost?** 68.97 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/719086838-diamond-tester-pen-professional-jewelry-diamond-selector-diamond-selector-novice) ## Best For - hmkis enthusiasts ## Why This Product - Trusted hmkis brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Smart Error Alerts:** Flashing warnings prevent false positives by detecting improper contact with metal or skin. - • **Precision Power Upgrade:** Type-C power option ensures ultra-stable voltage for pinpoint diamond detection accuracy. - • **Compact & Portable Design:** Lightweight and sleek, this pen fits perfectly in your toolkit or pocket for on-the-go testing. - • **Instant Authenticity Confirmation:** Clear LCD display, LED signals, and audible alerts deliver rapid, confident diamond verification. - • **User-Friendly for All Skill Levels:** No gemologist needed—simple steps let novices and pros alike identify real diamonds in seconds. ## Overview The HMKIS Diamond Tester Pen is a professional-grade, non-rechargeable jewelry tool designed for both novices and experts. Featuring dual power options including a stable Type-C supply, it uses advanced thermal conductivity sensing to quickly and accurately distinguish diamonds from imitations. Its intuitive LCD and LED indicators, combined with audible alerts, make diamond verification effortless and reliable anywhere. ## Description desertcart.com: Diamond Tester Pen, Professional Jewelry Diamond Selector Diamond Selector for Novice and Expert (Non-Rechargeable) : Arts, Crafts & Sewing Review: Good basic gem tester - Works well to determine if the gem is a diamond or moissanite vs a CZ or glass. It can not distinguish between a Moissanite or Diamond though. You need to not use gloves with this and touch the metal on the jewelry if you want to be sure that you are not touching the metal. This device uses thermal conductivity to try to see if the gem is a diamond. Diamonds have a high thermal conductivity unlike Cz and glass. So touching metal will register as a diamond as well. If you are touching the metal of the jewelry and the metal plate on the back of the tester it will flash saying the resistance is low hence metal. I am not going to bother posting images as there are a lot around Review: Great Tool for Quickly Verifying Stones - This diamond tester is highly accurate and reliable. I tested it on both genuine diamonds and moissanite, and it consistently identified them as diamonds. The setup was quick, and the device is very easy to operate with clear indicator lights and an audible alert for results. Its compact size makes it convenient to handle, and it comes with an adjustable sensitivity feature that ensures accurate readings across different stone sizes. Overall, it’s a simple yet effective tool that offers excellent functionality and great value for the price. ## Features - [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 of experimental and test results. Opting for the Type-C power supply is highly recommended for optimal performance. PLZ NOTE THIS IS Non-Rechargeable ! - [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 testing diamonds. Audible signals provide further assistance in interpreting readings, ensuring a swift and confident evaluation process. - [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 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 based on the results. The red light and beep emitted by the diamond tester indicate the presence of a diamond, making it a convenient and easy-to-use tool for anyone in need of quick and accurate diamond testing. - [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. - [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. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0DXP6X5HY | | Best Sellers Rank | #21,872 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #9 in Jewelry Diamond Testers | | Customer Reviews | 3.8 3.8 out of 5 stars (66) | | Date First Available | February 28, 2025 | | Item Weight | 5.3 ounces | | Item model number | 25-ZSB-CG | | Manufacturer | HMKIS | | Product Dimensions | 6 x 4 x 1 inches | ## Images ![Diamond Tester Pen, Professional Jewelry Diamond Selector Diamond Selector for Novice and Expert (Non-Rechargeable) - Image 1](https://m.media-amazon.com/images/I/61P7TFws5IL.jpg) ## Available Options This product comes in different **Color** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good basic gem tester *by P***. on October 26, 2025* Works well to determine if the gem is a diamond or moissanite vs a CZ or glass. It can not distinguish between a Moissanite or Diamond though. You need to not use gloves with this and touch the metal on the jewelry if you want to be sure that you are not touching the metal. This device uses thermal conductivity to try to see if the gem is a diamond. Diamonds have a high thermal conductivity unlike Cz and glass. So touching metal will register as a diamond as well. If you are touching the metal of the jewelry and the metal plate on the back of the tester it will flash saying the resistance is low hence metal. I am not going to bother posting images as there are a lot around ### ⭐⭐⭐⭐⭐ Great Tool for Quickly Verifying Stones *by R***A on September 27, 2025* This diamond tester is highly accurate and reliable. I tested it on both genuine diamonds and moissanite, and it consistently identified them as diamonds. The setup was quick, and the device is very easy to operate with clear indicator lights and an audible alert for results. Its compact size makes it convenient to handle, and it comes with an adjustable sensitivity feature that ensures accurate readings across different stone sizes. Overall, it’s a simple yet effective tool that offers excellent functionality and great value for the price. ### ⭐⭐⭐⭐ Diamond Detector *by L***N on July 17, 2025* I got this Diamond Doctor , and I don’t know yet if I like it only because the insane limited. Being a newbie I started on the low end scale however YouTube has the best instructions for many products bought, and do much more. It looks decent , the Diamond Detector and feels solid , I just wish the instructions were more detailed. --- ## 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.tn/products/719086838-diamond-tester-pen-professional-jewelry-diamond-selector-diamond-selector-novice](https://www.desertcart.tn/products/719086838-diamond-tester-pen-professional-jewelry-diamond-selector-diamond-selector-novice) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-06-17*