DETAILS
Thermal meter, tests for 17 common groups of gemstones (about 40 varieties), enlarge the product picture to see the scale in detail.
Works with any stone, loose or mounted in jewellery, even uncut stones. The only condition is that the stone (and tester) must be at room temperature.
Instruction manual (pdf download)
Video (youtube - demonstration)
Video (youtube - calibration - for serial numbers PTG111425 and after.
Guide to buying electronic gem testers (web page)
Guarantee: 1 year.
6 Videos
Accessories
Included:
Strong nylon carrying pouch
PP3 Battery
Power supply for mains. This has a 2-pin plug so we include a 2-pin adaptor. Note, it is not a battery charger!
Disclaimer
All testers must be used in conjunction with the user's skill, knowledge and experience. Under no circumstances shall QUICKTEST be liable for direct or indirect loss sustained in connection with any item. Nothing is 100% accurate, you must understand the limitations of any tester you buy. We also suggest you regularly test known samples to check for any obvious faults. Full support given for items you buy from QUICKTEST.
Alternatives
For a summary of all diamond and gem testers see the Comparison Chart, or see a more detailed explanation of what the various types of tester can (and can't) detect at Electronic Gem Testers. If you specifically need to test diamonds, consider a diamond tester, they are more finely-tuned for testing diamonds, see our Guide to Buying Diamond Testers.
[3] The probe / analogue meter: 17 stones; the digital meter: 40 stones.
[4] Skill and practice is required to use an optical refractometer, instructions are not included, see any textbook about gemmology…or the internet.
I am so happy to finally have a presidium gem tester! It came with everything I needed (including the plug adapter). Thank you for the quick and safe delivery and my free gift 😊
Date of purchase: 05/01/2026
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Trusted Customer
Feefo Verified
1 year ago
Standard Presidium Electronic Gem Tester (model PGT II)
Good Company to deal with, who kept me up to date on delivery times/any changes. Items were well packaged and as described. A wee free gift was a nice touch. Thank you.
Date of purchase: 29/05/2025
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susan moore
Feefo Verified
Ringwood
1 year ago
Standard Presidium Electronic Gem Tester (model PGT II)
I read some of the articles on the Quicktest website, about the use and limitations of the different gem testers, and I am happy with my choice. This was based on my budget, how easy the tester is to...
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Date of purchase: 04/01/2025
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Geraldine Mccormick
Feefo Verified
2 years ago
Standard Presidium Electronic Gem Tester (model PGT II)
Great for checking out small stones on jewellery, separates the garnets from the rubies, the glass from the diamonds and the topaz from the sapphires. You do need to calibrate it when it first...
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Date of purchase: 31/05/2023
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Margaret Moss
Feefo Verified
Warwickshire
3 years ago
DETAILS <p>We are a UK company offering fast delivery and easy telephone support.</p> <p>Bench model. Thermal meter, tests for 17 common groups of gemstones (about 40 varieties), enlarge the product picture to see the scale in detail.</p> <p>Works with any stone, loose or mounted in jewellery, even uncut stones. The only condition is that the stone (and tester) must be at room temperature. </p> ACCESSORIES <p>Included:</p> <p>Strong nylon carrying pouch</p> <p>Instruction book</p> <p>PP3 Battery</p> <p>Mains power adaptor</p> FURTHER INFORMATION <p>Have you seen the Fascinating article about gem testers? This will answer many questions about electronic gem testers (all electronic gem testers!) - how 'reliable' are they? How 'easy to use' are they?</p> <p>In summary: no gem tester will light up with a number (or name) that tells you, with 100% certainty, the name of the gemstone. This is because nature does not make gemstones to a standard formulae, there are always variations. To see how the readings of gemstones overlap, see chart.</p> <p>All of gemmology is a detective game, starting with an idea of what the gemstone might be (that is what electronic gem testers are for) then using knowledge and skill to find the answer.</p> <p>If you are new to gemmology, please DO buy this gem tester! - but also buy a good book about gemstones, the best is Gem Identification Made Easy. Not only is this a good guide to gemstones, it also has details of every gem tester, including hints, tips and advanced instructions. For more details of this book, click here - special discount price if you add a book when buying this item</p>
Our products help you buy, value and sell at auctions and fairs, in the shop, or trading online. We are experts in chemical and electronic test equipment and supply most pawnbrokers, precious metal traders and jewellers in the UK.
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We verify that reviews are from genuine customers by matching them to a sale or transaction. People are only invited to leave a review after purchasing from the business.
Our products help you buy, value and sell at auctions and fairs, in the shop, or trading online. We are experts in chemical and electronic test equipment and supply most pawnbrokers, precious metal traders and jewellers in the UK.
