Diamond Tester Pen, High Accuracy Jewelry Diamond Tester＋200g/0.01g Mini Jewelry Scale＋60X Mini LED Magnifying, Professional Diamond Selector for Novice and Expert, Thermal Conductivity Meter

Works great. This is helping me to learn to appreciate gemstones. I would buy it again.

Easy to carry around, a bit confusing at first, its as if everything is a diamond but I'm getting used to it.

I found all of the pieces worked as stated. I was particularly impressed with the portable microscope. I can actually read certification numbers on the girdles of the diamonds. Amazing! The diamond tester seemed like the first ones that came out many years ago. I tested with known samples before I rested results on it. Then along came a Moissanite. A moissanite tests as a real diamond. I cannot figure out why. They are made from different materials. I tried warming the stone first. No different. So if you use it rule out moissanite.

Great little Jen tester works like it says and easy to store it in its own bag

missing the mini scale , plus the magnify naver works, no 9 v. include it, also it looks that this item was use before

Fake! Beeps at everything

This product is a great beginner package. My daughter is loving it and it is a great learning tool

The pen works just fine if you follow the directions. You have to set the pen according to the carat size of the diamonds you are testing. I tested multiple diamonds that I knew were real, and other stones I knew were fake, and the pen detected them all correctly. The jewelry shop I purchase from uses a pen very similar to this one.