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๐ Test with confidence, invest with style.
The Purity Testing Kit by GTE is a professional-grade electronic tester designed for fast, accurate appraisal of gold, silver, platinum, diamonds, and moissanites. Featuring a safe, non-damaging touchstone and a bonus acid neutralizer, this all-in-one kit empowers jewelry investors and enthusiasts to verify authenticity and karat purity within seconds, backed by a trusted brand and top-tier customer ratings.






| Best Sellers Rank | #4,690 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #2 in Jewelry Gold Testers |
| Customer Reviews | 4.3 out of 5 stars 745 Reviews |
M**E
Muy bueno
โญโญโญโญโญ This is an excellent testing kit, especially for the price. It comes with everything needed to test diamonds, moissanite, gold, silver, and platinum, making it a great all-in-one solution. The electronic diamond tester is easy to use, provides quick and consistent results, and the included acids and testing tools are well organized. The instructions are straightforward, so even beginners can get started without much difficulty. Overall, this kit offers great value, feels well made, and is a reliable choice for jewelers, pawn shops, collectors, or anyone who needs to verify jewelry accurately. Highly recommended!
C**Y
"Excellent Purity Testing Kit with Outstanding Customer Service!"
I couldnโt be happier with this Purity Testing Kit! It has everything I need to test diamonds, gemstones, and metals like gold, silver, and platinum. The kit is comprehensive, with a digital diamond tester, various acid solutions, and clear instructions, making it easy to use even for a beginner. The real highlight, though, is the customer service. When the tip on my diamond tester broke, I reached out about the warranty, and they responded promptly and professionally. True to their word, they sent a replacement right away, and it arrived quickly. The company truly stands behind their product, and that gives me so much confidence in using this kit. This kit is reliable, accurate, and backed by excellent customer support. Highly recommended for anyone who needs a quality testing solution for jewelry and precious metals!
W**O
Worth the money, but find an alternative stone
For the price, this kit is decent. The acids, diamond tester, and loupe make it worth it. Even if the last two are of cheaper quality, they get the job done. As someone just starting out with jewelry, Iโd recommend for beginners. However, the stone is crap. Other reviews mention that the acids donโt work, but Iโd bet my money that itโs really the fact that the testing stone is actually glass. It doesnโt scratch well, and tests awfully. If youโre looking for an alternative, I found a real stone one under the SE brand for less than $10. Itโs tiny, but tests miles better than the glass they provide in this one.
S**I
Follow directions and it will work for you
This is a very comprehensive kit for easily testing your thrift store finds. It comes with a very reliable diamond tester that I know works because I've tried it on a real diamond ring and a CZ ring and it was obvious the way the lights work that it could tell the difference. It's amazing that it contained everything it did for the price, I think it's a great value. The only thing I'm missing now is a small accurate gram scale. No it did not come with the carrying case it came in a plastic bag, the carrying case that it is in I bought right here on Amazon.
M**R
Great, everything you need
Comes with everything you need to test with.
R**B
Gem checker
Quick easy test
A**.
Not fully reliable
I keep it set with the 4 green lights but it automatically puts the yellow lights on as well. Not put together well - feels Like it'll fall apart just by putting battery in. Your finger can throw the reading off . Metal also says it's diamond/moissanite. Don't waste your money
P**S
The acid testing seems to work correctly however the diamond tester is faulty
I've tried everything to get the diamond tester to work. I've even went on YouTube and got the exact directions for it and it still doesn't work. All it does is beep. I have turned it all the way down and it still doesn't work correctly. The metal testing seems to work. I have tested it with gold and silver. The gold definitely works correctly. Silver acid ate through the cap so make sure you store it up right
B**L
Exactly as advertised, very happy.
Exactly as advertised, very happy.
R**R
Speedy delivery
Great kit cant wait to try
I**O
Strumento per durezza pietre
Un pochino baracchetta
T**H
gold tester
Nice kit but missing the 9k test
G**H
Amazing
Delivery was a little slow but the product worked great
Trustpilot
1 month ago
3 weeks ago