Presidium Instruments Gem Tester II (PGT II) Now with Assisted Thermal Calibration (ATC) for Identifying Diamonds/Moissanites and Common Colored Gemstones

Given the number of reviews claiming the units were DOA and needed to be returned, I was hesitant to purchase. Yet, I was at a point that I needed a jeweler to tell me what those dandy stones were hidden inside that mountain of jewelry items After it arrived, we followed the calibration instructions, and it has worked well ever Maybe I just jinxed it, but I hope not. Lol This one is from my husband, and I think it's well-thought out Every session should start with a gem that you are absolutely sure of, to ensure that everything is on track and all the readings are correct. Diamonds in my engagement ring are the only stones I use. Then I do something even better, and I retest the diamond a few times during the testing session just to make sure we are still in the clear. The device will probably lead to items selling for a higher price and will help the seller confirm gem identity There are multiple reasons to move to the cloud, and it will pay for itself in a reasonable timeframe. I'll update if there are more details. Therefore, everything is going well so far.

Jovie Stephens

| Nov 18, 2020

The calibration would not work, so I returned this product. A second one came in the same way (and.

Eve Valencia

| Dec 15, 2020

Only since the beginning of the month have I owned this tester. In any case, we will see how things go in the future. I haven't run into any problems yet regarding calibration (knock on Please register your product as soon as you purchase it so you can receive assistance if the tester does not work as expected. Since I sell vintage jewelry (mostly costume jewelry) and come across items once in a while that need to be identified, I'm pretty inexperienced when it comes to gemstones, but it's great being able to test older pieces and determine whether they are gemstones or glass. My tester is a starting point for additional research, not the end all be all. I was pleasantly surprised that it easily identified several pieces I own that I hadn't thought were gemstones at all, or merely did not know the specific type of stone I possessed. I see the more probable scenario is that it will identify a stone as something such as quartz, then I shall have to go out and research the possibility of those stones that are found in multiple varieties. Thus, if you use this as a research tool and understand that you'll still have to go out and learn more, this is an extremely good investment and probably pays for itself in the process.

Freya Harrison

| May 06, 2021

My calibration happened after I read the instructions, watched the video on YouTube, and followed the steps. The machine would not calibrate, regardless of how many times it tried. I am disappointed. It is hoped that the new one will function correctly.

Caspian Riggs

| Aug 14, 2020

The price is high but it's well worth the money if you're going to sell jewelry and want to determine whether or not the stones are real. This is essential to me as I only sell jewelry on Ebay, and I want to ensure that I am prizing The first time I attempted to do it, I thought it was a bit extravagant, but I realized how essential it was to my business.

Abdullah Solomon

| May 24, 2021

The item I received was part of a pre-order The condition of this product is open. Due to circumstances beyond my control, I didn't open it until a few weeks after ordering it, and so once opened, it was past the return period for that item. As soon as the item was opened, it was evident that it had been previously opened and likely returned by the original Despite its outer box being fine, the inner box was almost crushed in transit. As indicated by the inner contents, it has likely been used before I received it, as it showed signs of opening. As I did, no one should receive a free item in an open box and pay full price for it. There are many reasons for this to be unacceptable.

Justice Sosa

| Jul 17, 2021

While I tried a testing pen (at least for that particular model), because I am also interested in gemstones and jewelry, I wasn't able to understand the readings. No one of the testers is able to figure out if gems are natural or synthetic. Can you make? According to my understanding, it is necessary to purchase additional testing equipment. There is a bit of confusion on the lower end toward "glass" since many gemstone species overlap. Since I do not possess the professional knowledge, I rely on intuition, for example, believing that a garnet is a garnet because of what it represents. In the second picture, you can see that reading. There is a little question about the calibration. It is simple to do, but sometimes the unit appears to be ready to test if you turn it on and wait until the flashing red light stops, but the reading may be off by a considerable margin. It's easy to do a quick callibration. It is exciting to me to be able to verify stones from glass, such as rubies, sapphires, diamonds and moissonites. Even mosonites can test as diamonds, so I pretty much know that they are lab grown or natural. That is the best unit I have used.

Briar Owen

| Aug 03, 2021

The tester was sent to me today, however it does not work. Firstly, I want to take a moment to thank you. Despite the fact that it's not brand new, it's still useful. One of the corners of the box of packaging was torn. The item could have been returned previously by someone else. A second issue is the indicator is off, even on Calibration or Glass testing out of the box. The return will be sent back. It is a waste.

Heaven Fischer

| Mar 12, 2021