Diamond Tester, Professional Jewelers' Gemstone Detector, High Accuracy Diamond Tester Pen Professional for Professional Jewelers, Gem Tester (Metal Detection Limitation)

It works. I’ve tested my real lab diamond earrings and blood diamond bracelets, and then I tested a cubic zirconia necklace and of course it did not pass! Great product.

Look for the price this thing is fantastic

Turned it on and all the green, yellow and red lights stay on… while it constantly goes through a series of three beeps repeatedly. Been waiting 5 min and nothing changes. Volume dial is turned just enough to turn it on. Scrolling the wheel does nothing.

This is electro current conductive and thermal so its the best for antique pieces and irregular cuts. Super fun you have to read the instructions for it to work accurately. I have several pieces fake and real and it works (been messing with it for like 30 mins straight just listening to the beeping lol) whoever says it's inaccurate just didnt read the instructions or interpret them correctly. Worked as expected no red flags. 5 stars

Worked good. Impressed for the price. Good quality

Kind of fun to play with for the price. I'm not sure I would bet my life on the accuracy of the results. It's fickle. I think it's kind of fun for reassurance, but if I really wanted a true answer, I would probably still have to take it to a professional.

Great diamond tester. It’s perfect for us. It’s spot on it picks up very quickly if the diamond is real or if it’s fake. It also picks up if gens and stones are real as well.

Great product at a great price. Instantly tell whether your diamonds are real. These days people are buying the man-made diamonds, which are diamonds, but not worth anything on resale!

Nice true

Broken nib and battery don’t work

Bad product

Gems stone per kaam nhi krta

Not working