--- product_id: 70328834 title: "Portable Electronic Diamond Tester Pen for Diamond, Sapphire, Ruby, Crystal, Agate, Jade, gems Multi Gemstone Precious Stones Hardness Test Tool, Diamond Selector II V2" brand: "jzk" price: "410 kr" currency: NOK in_stock: true reviews_count: 13 category: "Jzk" url: https://www.desertcart.no/products/70328834-portable-electronic-diamond-tester-pen-for-diamond-sapphire-ruby-crystal store_origin: NO region: Norway --- # 9+ indicator lights for precise gem ID Portable 16x4x2.2cm sleek design Compact 100g, powered by 1x 9V battery Portable Electronic Diamond Tester Pen for Diamond, Sapphire, Ruby, Crystal, Agate, Jade, gems Multi Gemstone Precious Stones Hardness Test Tool, Diamond Selector II V2 **Brand:** jzk **Price:** 410 kr **Availability:** βœ… In Stock ## Summary > πŸ’Ž Test Like a Pro, Shine with Confidence! ## Quick Answers - **What is this?** Portable Electronic Diamond Tester Pen for Diamond, Sapphire, Ruby, Crystal, Agate, Jade, gems Multi Gemstone Precious Stones Hardness Test Tool, Diamond Selector II V2 by jzk - **How much does it cost?** 410 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.no](https://www.desertcart.no/products/70328834-portable-electronic-diamond-tester-pen-for-diamond-sapphire-ruby-crystal) ## Best For - jzk enthusiasts ## Why This Product - Trusted jzk brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Instant Confidence:** Real-time light & sound feedback eliminates guesswork, empowering smart jewelry decisions. - β€’ **Multi-Gem Precision:** Accurately verifies diamonds, sapphires, rubies, jade & more with distinct light & beep signals. - β€’ **Portable & Lightweight:** Compact pen-sized tester fits perfectly in your toolkit or pocket for on-the-go authenticity checks. - β€’ **User-Friendly Calibration:** Easy probe calibration on glass ensures flawless readings every time. - β€’ **Professional Grade at Home:** Trusted by experts, now accessible for personal useβ€”never get duped by fake gems again. ## Overview The JZK Portable Electronic Diamond Tester Pen is a lightweight, battery-powered device designed to accurately identify real diamonds and multiple other precious gemstones through a unique light and beep system. Its compact size and easy calibration make it ideal for professionals and enthusiasts alike, providing instant, reliable authenticity verification for diamonds, sapphires, rubies, jade, and more. ## Description If the number of lights is equal to or greater than 9, and it beeps, it means the diamond is real. If the number of lights is 9 and it beeps, it means the sapphire is true. If the number of lights is 6.5 to 7, it means the agate is real. If the number of lights 7-8, it means the crystal is real. If the number of lights is 6 to 7, it means that the jade is true. β˜… Before the test: 1. Put the battery into the tester. 2. Remove the probe cover. 3. Turn on the switch. 4. Make sure only 1 light lights up on the scale. 5. Make sure the "lamp ready" light is on. 6. (If you test the diamond, then you need to turn on the number of lights corresponding to the inside temperature and weight of the diamond) 7. (If you test other gems, it is best to calibrate the probe before testing, method: placing the probe vertically on a piece of glass, then adjusting the light to 5, and then placing the probe on the gemstone to test) 8. The test is ready. β˜… Notice: *No matter what gemstone you are testing, the probe needle and the tested object should be at a 90Β° angle. *When testing the 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 you test other gemstones. *Do not test any metal. * Do not use gloves. Product size: 16 x 4 x 2.2 cm. Weight: 100 g. Power required: 1 x 9V battery (not included). The package contains: 1 diamond tester + 1 English introduction + 1 black storage box. If you have any problems with the tests, please contact us, we would love to help you. Review: Works Perfectly – Tested on a Real Diamond - I tested this diamond tester on a real diamond, and it worked exactly as expected. The results were quick and accurate, and the indicator lights made it very easy to read. It’s lightweight, simple to use, and ideal for checking gemstones like diamonds or rubies at home. For the price, it’s a great little tool that does the job well β€” definitely worth having if you want to test your jewellery. Review: I was skeptical due to the price but seems to work fine - Initially I was skeptical due to the very mixed reviews, however my experience of the item was very positive, I tested various stones as per the instructions, I had a ring that looked like diamonds to me but without testing, there was no way to be sure, I first tested items that I knew to be diamonds, followed by stones that obviously were not, the tester was able to confirm my suspicions as per my video that the 3rd item tested does contain diamonds. I think this is a great bit of kit for the money and the case it comes with was also great. ## Features - Warning:Not suitable for children under 10 years. For use under adult supervision - 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) - β˜… Notice: *No matter what gemstone you are testing, the probe needle and the tested object should be at a 90Β° 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. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07DHPYLCV | | Best Sellers Rank | 12,129 in DIY & Tools ( See Top 100 in DIY & Tools ) 17 in Multi Testers 248 in Jewellery Accessories | | Brand | JZK | | Customer Reviews | 4.0 4.0 out of 5 stars (2,837) | | Date First Available | 3 Jun. 2018 | | Guaranteed software updates until | unknown | | Item Weight | 110 g | | Material | Plastic | | Model Number | 76166 | | Package Dimensions | 17.3 x 6.9 x 4.9 cm; 110 g | ## Images ![Portable Electronic Diamond Tester Pen for Diamond, Sapphire, Ruby, Crystal, Agate, Jade, gems Multi Gemstone Precious Stones Hardness Test Tool, Diamond Selector II V2 - Image 1](https://m.media-amazon.com/images/I/512CcfDiPQL.jpg) ![Portable Electronic Diamond Tester Pen for Diamond, Sapphire, Ruby, Crystal, Agate, Jade, gems Multi Gemstone Precious Stones Hardness Test Tool, Diamond Selector II V2 - Image 2](https://m.media-amazon.com/images/I/71HAJUTFQpL.jpg) ![Portable Electronic Diamond Tester Pen for Diamond, Sapphire, Ruby, Crystal, Agate, Jade, gems Multi Gemstone Precious Stones Hardness Test Tool, Diamond Selector II V2 - Image 3](https://m.media-amazon.com/images/I/71BryMXRqGL.jpg) ![Portable Electronic Diamond Tester Pen for Diamond, Sapphire, Ruby, Crystal, Agate, Jade, gems Multi Gemstone Precious Stones Hardness Test Tool, Diamond Selector II V2 - Image 4](https://m.media-amazon.com/images/I/71UNvN4kFzL.jpg) ![Portable Electronic Diamond Tester Pen for Diamond, Sapphire, Ruby, Crystal, Agate, Jade, gems Multi Gemstone Precious Stones Hardness Test Tool, Diamond Selector II V2 - Image 5](https://m.media-amazon.com/images/I/61Km2ANiphL.jpg) ## Questions & Answers **Q: Can this test semi precious gemstones such as quartz, amazonite, lapis etc?** A: I always test a diamond first to calibrate it. A lot depends on the temperature in your room and the stone you are testing. Once it is set and your diamond goes into the red, then test your other stones. I have found that if it is a semi precious stone there will be a movement from your starting lights by maybe one or two sections. If however the stone you are testing is glass it doesn't move at all. Cubic zirconium also moves the light. It takes a few goes to find the right settings each time because of surrounding temperature. Sorry I can't help any further....I am still learning myself! **Q: Can it identify natural Zircon** A: My understanding is that it will not specifically identify zircon but would tell you the stone in question was not glass, crystal or diamond. As it works on conductivity I would expect zircon to give a high reading but not as high as diamond. **Q: What number is for emerald?** A: I don't know, but the best thing to do would be to find out using a known genuine emerald - someone you know will have one. But remember that apart from diamond, a particular value will only tell you the stone has conductive properties consistent with being an emerald - it would not be a definite identification. **Q: Can it detect gold chains aswell?** A: No, it will not detect gold chains since it's a gemstone detector ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works Perfectly – Tested on a Real Diamond *by D***D on 25 October 2025* I tested this diamond tester on a real diamond, and it worked exactly as expected. The results were quick and accurate, and the indicator lights made it very easy to read. It’s lightweight, simple to use, and ideal for checking gemstones like diamonds or rubies at home. For the price, it’s a great little tool that does the job well β€” definitely worth having if you want to test your jewellery. ### ⭐⭐⭐⭐⭐ I was skeptical due to the price but seems to work fine *by J***R on 24 November 2023* Initially I was skeptical due to the very mixed reviews, however my experience of the item was very positive, I tested various stones as per the instructions, I had a ring that looked like diamonds to me but without testing, there was no way to be sure, I first tested items that I knew to be diamonds, followed by stones that obviously were not, the tester was able to confirm my suspicions as per my video that the 3rd item tested does contain diamonds. I think this is a great bit of kit for the money and the case it comes with was also great. ### ⭐⭐⭐⭐ Good quality *by J***D on 4 May 2026* Good value for money, obviously not going to be the best in the world but does a really good job at its price point. ## Frequently Bought Together - JZK Portable Electronic Diamond Tester Pen for Diamond, Sapphire, Ruby, Crystal, Agate, Jade, gems Multi Gemstone Precious Stones Hardness Test Tool, Diamond Selector II V2 - 2 Pieces Jewelers Loupe 30X 60X 90X Illuminated Eye Loupe Magnifier Jewelry Magnifying Glass Loop with UV Black Light and Bright LED Light for Diamond Gem Coin Stamp Rock(Black) - KINGMAS 40x Jeweller Loupe Folding Magnifying Jewelry Eye Magnifier With LED Light Illuminated (LED Currency Detecting/Jewlers Identifying Type Lupe) --- ## 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.no/products/70328834-portable-electronic-diamond-tester-pen-for-diamond-sapphire-ruby-crystal](https://www.desertcart.no/products/70328834-portable-electronic-diamond-tester-pen-for-diamond-sapphire-ruby-crystal) --- *Product available on Desertcart Norway* *Store origin: NO* *Last updated: 2026-09-29*