Diamond Tester, Professional Jewelers' Gemstone Detector, High Accuracy Diamond Checker Pen Professional for Jewelers, Gem Tester (Jewelry-Only Detection)

This does seem to work at least to let you know if it is diamond versus rhinestone. The instructions are missing information that almost made me return it... You need to have your finger on the metal plate and hold the item in your other hand for the metal alert to work. Using this information made the detector function properly and accurately.

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.

Please don’t waste your money. I followed the instructions and my tester did not work. I was unable to return it in the usual way, which would be to go to Kohl’s. I would give them a zero star review if I could.

This is great for you to check your jewelry. It's a great value. Not sure why the battery died so quick. It seems to be accurate.

Ok for the price

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.

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

Be gentle using this

Nice true

Broken nib and battery don’t work

Bad product

Gems stone per kaam nhi krta

Not working