--- product_id: 719086838 title: "Diamond Tester, Powered by USB, Easy Use Jewelry Diamond Tester | Easy Use Jewelry Diamond Tester, Diamond Selector for Novice and Expert (Non-Rechargeabe)" brand: "hmkis" price: "R399" currency: ZAR in_stock: true reviews_count: 8 category: "Hmkis" url: https://www.desertcart.co.za/products/719086838-diamond-tester-powered-by-usb-easy-use-jewelry-diamond-tester store_origin: ZA region: South Africa --- # Clear LCD & LED indicators High-precision voltage output Dual power: Type-C & 9V Diamond Tester, Powered by USB, Easy Use Jewelry Diamond Tester | Easy Use Jewelry Diamond Tester, Diamond Selector for Novice and Expert (Non-Rechargeabe) **Brand:** hmkis **Price:** R399 **Availability:** βœ… In Stock ## Summary > πŸ’Ž Test like a pro, impress like a boss! ## Quick Answers - **What is this?** Diamond Tester, Powered by USB, Easy Use Jewelry Diamond Tester | Easy Use Jewelry Diamond Tester, Diamond Selector for Novice and Expert (Non-Rechargeabe) by hmkis - **How much does it cost?** R399 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/719086838-diamond-tester-powered-by-usb-easy-use-jewelry-diamond-tester) ## 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 - β€’ **Smart Error Alerts:** Flashing or auto-off protects against false readings from metals or skin contact. - β€’ **User-Friendly Design:** No expertise neededβ€”just select size, test, and get clear yes/no feedback. - β€’ **Versatile Testing Modes:** Large/small diamond settings adapt to any jewelry piece effortlessly. - β€’ **Rapid & Reliable Results:** Instant audible and visual signals let you verify authenticity in seconds. - β€’ **Power Upgrade for Precision:** Type-C power ensures stable voltage for ultra-accurate diamond detection. ## Overview The HMKIS Diamond Tester Pen is a professional-grade, non-rechargeable jewelry tool designed for both novices and experts. Featuring dual power options (Type-C and 9V) for stable voltage, it delivers quick, accurate diamond authenticity results via LCD, LED, and audible alerts. Its intuitive interface requires no prior knowledge, making it perfect for confident, on-the-go verification of diamonds versus imitations. ## Description desertcart.com: Diamond Tester Pen, Professional Jewelry Diamond Selector Diamond Selector for Novice and Expert (Non-Rechargeable) : Arts, Crafts & Sewing Review: Nice - Works as expected Review: The test results are inaccurate. - The promotion claims that it can accurately identify diamonds. However, the actual detection process has significant flaws. Synthetic sapphires, zircons, crystals and other diamond imitations can all be identified as genuine diamonds by the instrument. ## 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 | |---------------|-------| | Best Sellers Rank | #244,278 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #78 in Jewelry Diamond Testers | | Customer Reviews | 3.7 out of 5 stars 91 Reviews | ## Images ![Diamond Tester, Powered by USB, Easy Use Jewelry Diamond Tester | Easy Use Jewelry Diamond Tester, Diamond Selector for Novice and Expert (Non-Rechargeabe) - Image 1](https://m.media-amazon.com/images/I/61P7TFws5IL.jpg) ## Available Options This product comes in different **Color** options. ## Questions & Answers **Q: Why do I get diamonds in almost everything I test?** A: The device is set to the wrong setting. The S setting is the ultra-sensitive setting and can only be used to test Micro-Diamonds. This setting will cause false readings if it is used to test objects weighing more than 0.2 grams. **Q: Why does my device barely respond when I test diamonds?Why not work?** A: The L setting is specifically designed for large diamonds. If you use this setting to test small diamonds, the device will barely react. **Q: What should I do if I don't know the exact size of the diamond?** A: You can start by testing with the M setting. The M setting is for testing diamonds between 0.5 and 1 carat. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Nice *by K***Y on July 18, 2026* Works as expected ### ⭐ The test results are inaccurate. *by A***R on June 8, 2026* The promotion claims that it can accurately identify diamonds. However, the actual detection process has significant flaws. Synthetic sapphires, zircons, crystals and other diamond imitations can all be identified as genuine diamonds by the instrument. ### ⭐⭐⭐⭐⭐ 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 --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.za/products/719086838-diamond-tester-powered-by-usb-easy-use-jewelry-diamond-tester](https://www.desertcart.co.za/products/719086838-diamond-tester-powered-by-usb-easy-use-jewelry-diamond-tester) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-08-15*