Diamond Tester Pen, Professional Jewelry Diamond Tester with 60X Jewelry Loupe Magnifier, Diamond Selector for Novice and Expert (Non-Rechargeable)

works great and was affordable! no reason to buy an expensive one when this one works just fine!

I recently got my hands on this diamond tester pen, and I couldn't be more happy with it. As someone who loves jewelry, this tool has made identifying genuine diamonds, moissanite and CZ a breeze. It truly does differentiate CZ from Moissanite and Moissanite from Diamonds! It offers precise readings that help me differentiate between real diamonds and imitations effortlessly. The pen is incredibly easy to use, providing quick and accurate readings that give me confidence in my purchases. It fits comfortably in my hand, and the sleek design makes it a joy to use. I also appreciate how portable it is; I can take it anywhere and test stones on the go to show friends. Just a single use could save you from fraudulent stones claiming to be one thing and then are something else. Everyone should have this tester at home. I cannot say enough good about this item. This little gadget has truly elevated my jewelry-buying experience so I never get taken. You gotta get one. Highly, highly recommended. : )

The media could not be loaded. Came to write a review right from the order page, but it's a different combo of products from what I ordered, so bear with me here. Odd.I read all directions both online and that came with tester. I watched all the videos. What I missed until I came back to the product page is that the tip DOES NOT depress, so don't try to press too hard! Another thing was that the scale light will traverse green, yellow, red and back until it is warmed up (see video). And lastly, the tester remains on whether you turn it off or not for as long as it is plugged into the USB. It did NOT come with a 9V battery as described in the product description, so I can't say if it does that with a battery in it.It worked as described, though inconsistently. I figured out that the copper tester tip had a burr on it that wasn't allowing it to make complete flat contact. I used one of my jeweler's files to very gently take that burr off and it works well now. Won't give me a RI number as I had hoped, but it does test diamonds.The little dish they give to hold stones while you test them is about useless...the stones slide around as you try to test - I suggest investing in a good pair of locking tweezers. I'm digging the 60x lighted loupe, though it's kind of silly for gemstones because you need light to pass through the stones, not onto the stone, to see flaws and inclusions, but the UV appears to be 365 which is great as long as it's not reflecting back into your eyes. Im going to figure out a way to mount the loupe over a light. 60x shows much more than my 10x.Carry cases are cheap but functional. I didn't try the USB C cord because I keep one plugged in at my desk already.Final word: It works, but I will be investing in the fancy Presidium.UPDATE: After testing several known diamonds over the course of several days, this unit quit working (no, it didn't get too cold, no breeze, I allowed it to reheat after each stone, I followed the directions). I didn't pay much, so it's not worth the hassle of trying to return it. Besides, I do still like the lighted loupe! ;)

So far everything seems to work. I have tested several different types of gem stone’s just to see if anything would register. It bottomed out when I tested the diamond’s but had no reaction for my citrine quartz stone’s. I will try it on my emerald’s and sapphire’s next.The emerald’s I’m getting are lab created so I’m definitely interested in seeing what they show.The magnifier is mainly for coins and stuff which it clearly says on the box it comes in.The gem set works great but I did put a pad actually the pad that came in the box with the tester under the set so I wouldn’t have any accidental slip while testing the gem’s. I will have to say it’s a very useful piece of equipment if you are just starting out with gemstones and even for the more experienced.

After reading others’ reviews it looks like this brand (HKMIS) has defective products. Mine did not work at all, even after charging it fully. It does not power on. Absolute garbage product.