Xinler Accuracy Jewelry-Diamond Tester Pen Professional Jewelry Diamond Tester Tool

Easy to use, I take it along with me to rummage and yard sales. Good price too.

Diamond tester is junk

From I buy this product it never work the battery I put in it are all new batteries just waste of money

I found what I thought was a diamond laying on the ground in the parking lot at a local Walmart. It captured the light just right, so even though it was tiny, I was still able to see it. It cut glass, but lab created diamonds can also cut glass. I was going to take it to one of our local jewelers to look at it and see if it was real, however I knew they could probably get over on me, so I just bought this for myself. It's good to have, especially when buying 2nd hand jewelry that people claim are real - this is a good tool to carry so you can verify before getting scammed. I tried it on one of the rings in my bridal set, it identified it was a genuine diamond (listed as this as well), and I tried another ring, swarovsky crystal, it didn't light up. I tried the "diamond" I found in the parking lot and it was a very low reading on the meter, meaning it was not a genuine diamond. Broke my heart but I'm glad I was able to check and get an answer! I recommend this tool, especially if you're interested in gems and such.

Once I came back here to read all the info on it it worked great. There’s nothing included that tells you to remove the black cap to expose the needle.I’ve only used it on very small diamonds on a ring I’m currently wearing. I bought this so I can find my real diamond stud earrings among all the fakes I’ve bought. Oy!The reviews stating that it doesn’t work haven’t done their homework. It works fine.

I followed the instructions. I know a little bit about gems. I was not getting readings for what I had already proven to be legit stones. The other problem that concern me is that the bag that the item came with contained a jagged piece of strange plastic that I was unsure was supposed to be a part of the unit itself or who knows. But I'm returning this. One star for trying. One star for nice instructions that unfortunately did not help with the products operation. Perhaps I indeed received a broken unit. I won't know because I'm not reordering this.

Works on I guess. Hard to understand

Item worked as stated in description. Tested some rings and they tester was spot on. I would buy again.