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)

I was worried but this is excellent. Very accurate. Easy to use. Durability feels cheap but good. Tested some jewelry read everything correctly.

So far, I think it works very well. This is my first time using it, as I’ve bought several pieces of jewelry for my collection.It turns out the diamond immediately registers as red, and the moissanite—as expected—also registers as red, though not all the way to the top. With another large stone I have—actually from a pair of old earrings where I didn't even know what the stone was—the light didn't move, nor did it make the recognition sound. So, I think it really works.Simple to use, store, and reuse.

I purchased this diamond tester to verify a few pieces of jewelry, and it has performed well so far. The readings have been consistent and accurate, which gave me confidence in the results.The included instructions were helpful and mostly easy to understand, even for someone without prior experience using a diamond tester. It was straightforward to start testing stones.My only complaint is the battery cover. It does not feel very secure and seems like it could come loose more easily than it should. It doesn't affect the tester's performance, but it does make the overall construction feel a little less polished.Overall, this is a useful and accurate tool that gets the job done, especially for the price.

Works great! No complaints at all. Read the directions carefully and you won't have any issues with it.

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.

I liked it because it is easy to use, and the instructions are quite clear—even for someone with no experience with jewelry. The accuracy feels reliable enough for quick checks at home, and the results appear almost instantly. It also struck me as durable; it doesn't feel cheap or fragile. The sound it makes when detecting is soft and unobtrusive. For the price, I feel it offers excellent value for money and performs its function very well

Easy to use and accurate. Very handy for testing jewelry left behind by relatives.

Satisfied with this device

The Diamond Tester worked very well

for this price its perfect .

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