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

Simple to use and very functional. Great item. Very well made. Amazing size and quality.

Received product as described. Works very easy with easy-to-understand directions.

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.

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.

Worked good. Impressed for the price. Good quality

The battery didn’t work but I switched it and it worked fine. It works well even for rocks smaller than .5 cart.

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.

Love this diamond tester. It does give accurate reading and is easy to use.

Nice true

Broken nib and battery don’t work

Bad product

Gems stone per kaam nhi krta

Not working