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2025-09-06 15:01:17
This is my second Presidium gem tester. It is easy to use, although sometimes the calibration can be tricky. I have found that if you let the unit warm up for at least an hour, it minimizes the need for re-calibration. I use if for my vintage jewelry hobby.
Kathy Kessler
2025-09-05 09:45:25
I was always wondering if the stones I buy were as described. This instrument helped with that deciding factor. I’ve had no issues with it so far.
KathrynT.
2025-08-28 17:46:42
I am learning to use this gem tester, I purchase several vintage items and needed this instrument to confirm what the sellers of these jewelry items are wht they state they are. Further, I had to return the first unit as I did not think it was working properly nor did it have a user manual, and it looked used. Seller shipped via FED EX an exchange in record time, that to me was very impressive and showed that they care! Meanwhile I was able to download a user's guide and its been most helpful! Thank you 'FindingKing' for your excellet customer care, I appreciate you very much.
Randall G. Neighbour
2025-08-19 12:50:11
Bought this for my wife to use to check out all her jewelry. She discovered one piece is not a gem but colored glass! It took us a couple of times to calibrate it, but we did it successfully. Not sure what these kinds of things should cost, but it seems overpriced to me... but it's a supposed precision instrument so maybe it's not overpriced. It's certainly not industrial grade equipment, but good for the jewelry collector/reseller/buyer. Comes with a nice case. Seems to be more accurate and capable than the pens you can buy for a lot less money.
Cynthia B. LaRue
2025-08-13 12:44:22
This tester is amazing so glad I finally broke down and spent the money for it. It’s well worth it.
Carmen Rivas
2025-08-10 14:06:49
Don't order this. I did, could not get mine to calibrate, I initiated a return and I had a choice to return it, or swap it out. So I chose to swap it out, now that whole return is "missing". No information whatsoever of this return. Now what do I do??? I have to pay almost $300 for something I don't even have in my possession.
P.M. Fisher
2025-08-08 09:45:53
I got such a good deal on this gem tester! It arrived quickly and I’m very happy!
Whiteagle
2025-08-07 11:04:37
It worked as designed but you have different choices for gems and have to figure out which of those it is based on color. Since many gems can be different colors I couldn’t really figure it out. I know many people that use this tester and like it but it wasn’t for me.
Ray Landreau
2025-08-03 17:47:42
Testing
Emmanuel Kpahn
2025-07-23 17:47:23
The presidium instrument gemstones tester is a good product. It would have been great if there where actual light to indicate the name of the exact stone instated of just a line with more the one name leaving you to guess what exactly it's.
Blake
2025-07-21 18:51:55
I like the variation this tester has for identifying various gems .However , I find the pen has been extremely finicky and I can hardly have it calibrate up to the Cal indicator level without constantly cleaning and wiping down the cal glass and pen tip.I may have received a faulty pen as it has play back and forth ?
Lana
2025-07-14 10:37:46
This tester was broken, I only wasted time on waiting for it and the returning it.
Customer
2025-07-09 16:06:12
The categories are vague so follow up research is definitely needed. I tested a large 100% known-to-be amethyst and it miss read it completely, so that was quite disappointing. Hard to trust the readings after that fail.
SLB
2025-07-04 11:41:32
This is my second Presidium gem tester. It is easy to use, although sometimes the calibration can be tricky. I have found that if you let the unit warm up for at least an hour, it minimizes the need for re-calibration. I use if for my vintage jewelry hobby.
Kathy Kessler
2025-06-19 15:37:43
I was always wondering if the stones I buy were as described. This instrument helped with that deciding factor. I’ve had no issues with it so far.
KathrynT.
2025-06-10 12:39:08
I am learning to use this gem tester, I purchase several vintage items and needed this instrument to confirm what the sellers of these jewelry items are wht they state they are. Further, I had to return the first unit as I did not think it was working properly nor did it have a user manual, and it looked used. Seller shipped via FED EX an exchange in record time, that to me was very impressive and showed that they care! Meanwhile I was able to download a user's guide and its been most helpful! Thank you 'FindingKing' for your excellet customer care, I appreciate you very much.
Randall G. Neighbour
2025-06-03 18:56:22
Bought this for my wife to use to check out all her jewelry. She discovered one piece is not a gem but colored glass! It took us a couple of times to calibrate it, but we did it successfully. Not sure what these kinds of things should cost, but it seems overpriced to me... but it's a supposed precision instrument so maybe it's not overpriced. It's certainly not industrial grade equipment, but good for the jewelry collector/reseller/buyer. Comes with a nice case. Seems to be more accurate and capable than the pens you can buy for a lot less money.
Cynthia B. LaRue
2025-05-25 16:46:40
This tester is amazing so glad I finally broke down and spent the money for it. It’s well worth it.
Carmen Rivas
2025-05-21 16:30:18
Don't order this. I did, could not get mine to calibrate, I initiated a return and I had a choice to return it, or swap it out. So I chose to swap it out, now that whole return is "missing". No information whatsoever of this return. Now what do I do??? I have to pay almost $300 for something I don't even have in my possession.
P.M. Fisher
2025-04-20 15:04:07
I got such a good deal on this gem tester! It arrived quickly and I’m very happy!
Whiteagle
2025-04-18 11:06:14
It worked as designed but you have different choices for gems and have to figure out which of those it is based on color. Since many gems can be different colors I couldn’t really figure it out. I know many people that use this tester and like it but it wasn’t for me.
Ray Landreau
2025-04-09 11:45:07
Testing
Emmanuel Kpahn
2025-04-02 13:11:08
The presidium instrument gemstones tester is a good product. It would have been great if there where actual light to indicate the name of the exact stone instated of just a line with more the one name leaving you to guess what exactly it's.
Blake
2025-03-22 12:10:24
I like the variation this tester has for identifying various gems .However , I find the pen has been extremely finicky and I can hardly have it calibrate up to the Cal indicator level without constantly cleaning and wiping down the cal glass and pen tip.I may have received a faulty pen as it has play back and forth ?
Lana
2025-03-19 16:21:16
This tester was broken, I only wasted time on waiting for it and the returning it.
Customer
2025-02-06 16:23:59
The categories are vague so follow up research is definitely needed. I tested a large 100% known-to-be amethyst and it miss read it completely, so that was quite disappointing. Hard to trust the readings after that fail.
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