Diamond Tester,High Accuracy Jewelry Diamond Tester Professional Diamond Tester Pen Jeweler Tool for Novice and Expert - Diamond Selector II 9V Battery Included(Black Diamond Testers)

Works great. Will have to read instructions on how to set it for different diamonds. Great product for the price. Very easy to use.

Tested against several different type gems, never missed a real diamond.

Excellent for testing diamonds. I was hoping that it would also test hardness of other stones, but only diamonds.

very accurate. great price for what it is. easy use.

I find this diamond tester has to be recalibrated almost after every use. My previous diamond tester I could use to identify gemstones in jewelry based on where it identified the hardness to be. This one seems to only work on diamonds accurately and also seems to have a larger tip so just beeps on tiny diamonds because it hits the metal. I haven't had too much of an issue with battery life though. I would not buy again and actually I am going to try to replace this one with a more accurate one. Technically it does test diamonds though if they are large.

fix the battery holder damnit, a bunch of reviews are saying this and the instructions are bare minimum but I figured it out. I wouldn't consider it the best there is no secure place to put the battery. it legit has no secure holder the connectors are loosely just sitting inside as you see in other review photos. I at first assumed it got that in shipping but... WRONG it arrives this way naturally with no damage to packaging. soon as you place the battery in the unit will lose power soon as the battery shifts out of position of the connectors due to it having no placement in the area whatsoever. you just place the battery in and angle it right enough for the lights to stay on. as far as accuracy it definitely can tell glass from diamond and moissanite. it definitely feels cheaply made like you could drop it and it'll break or step on it accidentally and break. due to the battery situation the functionality is lacking and I feel like you could just find better value for your buck where quality of the consumer is put in the front.

This works well. You need to read the instructions to make sure that you have it on the correct settings.

It cannot tell the difference between moisanite and genuine diamonds but it is cool to have!

Satisfied with this device

The Diamond Tester worked very well

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