--- product_id: 516755405 title: "Diamond Tester, Jewelry Diamond Tester Pen ＋ 40X Mini LED Magnifying, Diamond Selector for Novice, Thermal Conductivity Meter" brand: "hmkis" price: "270.20 DT" currency: TND in_stock: false reviews_count: 5 url: https://www.desertcart.tn/products/516755405-diamond-tester-jewelry-diamond-tester-pen-40x-mini-led-magnifying store_origin: TN region: Tunisia --- # Thermal conductivity tech 40X LED magnification Dual-frequency sound alerts Diamond Tester, Jewelry Diamond Tester Pen ＋ 40X Mini LED Magnifying, Diamond Selector for Novice, Thermal Conductivity Meter **Brand:** hmkis **Price:** 270.20 DT **Availability:** ❌ Out of Stock ## Summary > 💎 Test like a pro, shine like a boss! ## Quick Answers - **What is this?** Diamond Tester, Jewelry Diamond Tester Pen ＋ 40X Mini LED Magnifying, Diamond Selector for Novice, Thermal Conductivity Meter by hmkis - **How much does it cost?** 270.20 DT with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/516755405-diamond-tester-jewelry-diamond-tester-pen-40x-mini-led-magnifying) ## 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 - • **Portable & Safe:** Compact pen design with 40X LED magnifier lets you inspect and verify diamonds anytime, anywhere—no damage guaranteed. - • **Beginner-Friendly Design:** Intuitive operation with LED level meter and sound cues makes diamond testing accessible to novices and pros alike. - • **Smart Initialization Setup:** Customizes testing parameters based on room temperature and diamond size for next-level accuracy. - • **Clear Differentiation Alerts:** Distinct low-frequency beeps for diamonds and high-frequency buzzers for metals keep you confidently informed. - • **Precision Two-Handed Testing:** Ensures accurate readings by requiring contact with the conductive panel for flawless diamond verification. ## Overview The HMKIS Diamond Tester Pen combines thermal conductivity technology with dual-frequency sound alerts and a 40X LED magnifier to deliver fast, safe, and beginner-friendly diamond verification. Designed for precise two-handed operation and customizable initialization, it distinguishes real diamonds from imitations with clear visual and audio cues—perfect for novices eager to authenticate their gems confidently. ## Description [VERY IMPORTANT] Please pay attention to BOTH the sound and the level meter bar when testing. When testing diamond, it will sound Bee-Bee-Bee in a normal frequency and lights >=9 ，while for other items such as metal,coin,or thers, it will Emits rapid high-frequency beeping.(plz check the vedio) [Intuitive Design]: Fake crystal, such as cubic zirconium ( CZ ), crystal, glass will be no sounds and lights <9. [fast and safe ]: This diamond selector tester designed for quick, precise, and safe diamond testing. No harm to diamonds. [For Diamond] When testing diamond(both real Mosanite and diamonds), it will emits in a low frequency beeping and 1-4 pieces of the RED LAMP box of the level meter light on(the begger the size of the stone is, the more pieces of the red lamp box of the level meter light up) Review: You do not have to be a jeweler to know how to use this. Very easy to use. Just read instructions. I was surprised at the quality and value of the items. I bought mine after I had my ring resized. My diamonds looked so clean the I swore they switched them. LOL they definitely didn't. They just needed s good cleaning. I used this on all my jewelry and it works great! Review: It was used to test diamonds but gave the wrong results. ## Features - 【TWO-HANDS TEST】 It is essential to perform all tests using two hands - one to hold the diamond and the other to operate the diamond tester. The hand that holds the diamond tester must make contact with the electricity conductive panel on the back of the unit. Testing the diamond with just one hand will result in inaccurate readings. - 【INITIALIZATION SETUP】 We have to finish the initialization setup by the following 2 steps: 1st we have to check the detailed room temperature and diamond size,find the Initial value of our test.you can find the detailed table on the back of the diamond tester pen. 2nd we have to turn the wheel to set the Initial value.eg if the size of diamond is small than 0.05ct, and the temperature is more than 30 degrees Celsius,then set the Initial value as 7, it means you have to turn the weel and keep 7 lights on. Otherwise you won't get a acuracy result. - 【CAN'T DISTINGUISH MOISSANITE】Please note that this diamond testing pen is designed as an entry-level tool for beginners. It is capable of distinguishing between diamonds and imitation gemstones. However, it is not able to differentiate between natural diamonds and laboratory-grown diamonds (also known as Moissanite). - 【FOR DIAMOND】For testing diamond, it will emits beeping-beeping-beeping in a low frequency, 1 time/second. Meanwhile 1-4 pieces of the RED LAMP box of the level meter light on(the bigger the size of the stone is, the more pieces of the red lamp box of the level meter light up) - 【FOR IMITATION 】When Testing Imitation stone,such as cubic zirconium ( CZ ), crystal, glass, there will be no sound, and the red lamp won't light. - 【METAL ALERT】When Testing metal, it will emits beeping-beeping-beeping in a high frequency,5times/second. The thermal conductivity of the metal is very high and can give the same indication as a diamond with most thermal probes.) This Diamond Selector II has a metal Alert Buzzer to warn you when touches metal. If you hear the Metal Alert buzzing sound,re-touch the probe tip so as to touch only the tested stone. - 【DON'T WAER GLOVES】When testing, please don't weart gloves. - 【CUSTOMER SERVICE】For any questions, feel free to contact us. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BVYLL61V | | Best Sellers Rank | #292,068 in Toys ( See Top 100 in Toys ) #1,261 in Kids' Jewelry-Making & Beadwork Kits | | Brand | HMKIS | | Color | Basic Diamond Tester | | Customer Reviews | 4.2 4.2 out of 5 stars (244) | | Date First Available | 28 February 2023 | | Item Weight | 200 g | | Material | glass | | Model Number | HMKIS | | Product Dimensions | 26 x 6 x 3.5 cm; 200 g | ## Images ![Diamond Tester, Jewelry Diamond Tester Pen ＋ 40X Mini LED Magnifying, Diamond Selector for Novice, Thermal Conductivity Meter - Image 1](https://m.media-amazon.com/images/I/51J87phgk4L.jpg) ![Diamond Tester, Jewelry Diamond Tester Pen ＋ 40X Mini LED Magnifying, Diamond Selector for Novice, Thermal Conductivity Meter - Image 2](https://m.media-amazon.com/images/I/51LRCBdHKdL.jpg) ![Diamond Tester, Jewelry Diamond Tester Pen ＋ 40X Mini LED Magnifying, Diamond Selector for Novice, Thermal Conductivity Meter - Image 3](https://m.media-amazon.com/images/I/51jvjdlC6fL.jpg) ![Diamond Tester, Jewelry Diamond Tester Pen ＋ 40X Mini LED Magnifying, Diamond Selector for Novice, Thermal Conductivity Meter - Image 4](https://m.media-amazon.com/images/I/61Cm4Q25bzL.jpg) ![Diamond Tester, Jewelry Diamond Tester Pen ＋ 40X Mini LED Magnifying, Diamond Selector for Novice, Thermal Conductivity Meter - Image 5](https://m.media-amazon.com/images/I/61gH95kawuL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by M***H on 26 November 2023* You do not have to be a jeweler to know how to use this. Very easy to use. Just read instructions. I was surprised at the quality and value of the items. I bought mine after I had my ring resized. My diamonds looked so clean the I swore they switched them. LOL they definitely didn't. They just needed s good cleaning. I used this on all my jewelry and it works great! ### ⭐⭐⭐⭐⭐ Review *by T***. on 11 May 2023* It was used to test diamonds but gave the wrong results. ### ⭐⭐⭐⭐ Review *by H***N on 29 September 2024* It works, but sometimes the lights aren’t lighting up on the side Is sometimes the beeping won’t stop even after I’ve put it away from the stone And I end up having to reset the machine It feels durable. It doesn’t feel like it’ll break very easily. And it seems accurate when it wants to work it’s not really hard to use . It’s one of those you get what you pay for and it’s not bad for its Price ## Frequently Bought Together - Diamond Tester, Jewelry Diamond Tester Pen ＋ 40X Mini LED Magnifying, Diamond Selector for Novice, Thermal Conductivity Meter - WELLZEER Keychain Magnet for Testing Brass,Keychain Pocket Magnets for Purse with Strong Magnetic Rare Earth Neodymium,Gold,Silver, Jewelry,Ferrous Metals Test Magnet (2PACK-D12mm) --- ## 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/516755405-diamond-tester-jewelry-diamond-tester-pen-40x-mini-led-magnifying](https://www.desertcart.tn/products/516755405-diamond-tester-jewelry-diamond-tester-pen-40x-mini-led-magnifying) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-08-07*