Diamond Testeï¼â€¹60X LED Magnifying Glasses Jeweler Tool Kit Comboï¼Å’for Novice and Expert - Diamond Selector II 9V Battery Included(Diamond Tester+)

The stone, I tested it on, was a not diamond. So, the less rating I gave to the device is because of the stone I tested it on and not because of the machine itself.After machine failed to detect it as a diamond, I did hot-cold test, due to which the stone cracked. Still, I can't say the machine is good or bad because I don't have a real diamond.

Waste of money

Easy to use.

The media could not be loaded.  Product defectiveTrash

Didn’t work. Returned.

This tester works great when you have it set right. Bought it for my girlfriend because she loves diamonds. (No surprise there)We recently went to the Arkansas diamond mine and I found what could be a 3 carat diamond. But we also brought back a 5 gallon bucket of field dirt. She went through it in 5 days and found 3 more maybe's.Got the tester today and read the directions.Make sure to read the directions, otherwise your toenail might be a diamond.Anyway, she tested the stones in the pictures and all came up diamond. We also had a black rock to keep the tester accurate.Now shes testing my patience with all these cups of little rocks in them. Not sure if they are from the bucket or just the driveway.But none the less, the thing works. The eye loupe isnt bad either. Bright lights and clear lenses. I would recommend this tester.