Standard Electronic Gem Tester (Presidium PGT II)

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.