Gem Indicator (PGI) Gem Tester

Pretty easy to use. Works excellent.

I used the device a couple of times before the thing gave me tip error. I treated it carefully after reading all the reviews, but it still broke. Called the seller and he had me send it into the manufacture, after being gone 2 months, I finally received the same device back with a new tip. GREAT... not been using it for less then a week and it is already acting up.. keeps saying testing and I never even touched the tip to a stone. Should of been made in the USA maybe it would work better. STAY AWAY unless you have 200+ to throw AWAY!!!!

Super product, makes my work much easier, I use it on the go when buying gems. 😊

Nice idea in theory and ergonomically it is very nicely designed. My unit had problems though starting with the battery compartment cover which just fell off when snapped into place...needed two pieces of tape to keep it on securely. Much more importantly however, the software appeared to have substantive issues as it would go into a loop wherein it consistently thought it was testing a gem. The only stone it was able to reliably identify was diamond. Otherwise, it was unable to ID tourmaline, spinel, amethyst, topaz, or other common colored stones. Overall, if it worked well it would be a great instrument but in this case I think I will go to one of Presidium's analogue display testers which have proven reliable over a longer period of time.

Mine came with a faulty calibration disc #2. So I had to register device with manufacturer for warranty and then contact support to get a replacement calibration disc. Kind of a pain in the a$$ for something that should be ready to go out of the box! Prior to calibrating the device, I did do a test for accuracy. 5 out of 4 stones (2 rubies and 2 sapphires, 1 peridot) peridot I purchased on Ebay came back as green glass 😡, 2 sapphires tested accurately, 1 ruby tested accurately and 1 ruby tested as spinel. (All purchased on EBay). It’s a little too fat / bulky for my hand as far as comfort for my hand for prolonged use. So other than the calibration test fail error and having to contact Manufacturer and file a claim to send me replacement for disc #2, I’d say my purchase was worth the expense. I’d recommend it.

It’s a little vague when narrowing down gems. Battery life isn’t very good spend a little for and get the analog model.

Slim design. Easy to use. So far so good.

Recieved item already opened and used and defective. Will be returning this and trying it from elsewhere. Inconsistent results may be from damage from prior user. If it gave consistent readings and the tip worked reliably it would be great, alas this particular one is a mess. Plastic packaging for USB cord open and empty (usb loose in box), power button had crud on it, plastic tape to cover screens was on the wrong side of it and battery cover won't stay on. Will be returning for refund.

Looks good and sounds like it would be a good investment for gem testing, but in reality it is not very reliable. You can test the same item multiple times and get different results after each test. Not really worth what they charge, and I probably wouldn't recommend this product....

I bought this because I have a vintage jewelry business and I live in a rural area. I don’t have access to a gemologist or an appraiser to tell me what kind of gems are in some pieces or if they are real. Some I already know what they are and when I tested them on this way too expensive for what you get product it was wrong about 90% of the time. It has a very limited amount of gems it can tell you what they are and if it doesn’t know it just says it’s glass. I also didn’t realize that it didn’t come with any extra probe tips. You have to buy them separately from who knows where. It didn’t even come with the proper instructions to download. I had to find those on my own, unless I was sent the wrong product, the cheaper version and was charged for the more expensive version. I would not recommend this product! Stay away, it’s a complete waste of money!!