Presidium Gem Tester II PGT

الجهاز جيد ويعمل دون أي مشاكل، لم استفد منه بشكل كامل لاني استخدمته لفحص الصخور والاحجار في صورتها الاساسيه وليس المجوهرات والمشغولات كما يفترض.

i buying this in first 14 days its work good then after 16 days its give me voltage from diamond to glass not from glass to diamond i hobe i can change with another items from same seller waite answer

The Presidium was everything that I expected. Works well and the calibration instructions were easy to follow. I have only one suggestion for improvement and that is to value add by offering a US-to-Australia power plug adaptor.

A neat tool to have in checking for diamonds (and some other stones) but hard to read between some types of gems as the identification bands overlap. It is, however, VERY good at diamond testing and if you have some knowledge of gemology it is helpful in testing other stones as well. Very good at ID-ing glass and plastic, so it is good to have for that alone when looking at old costume stuff. Calibration is easily accomplished and it holds for several operations. Battery life is sufficient for a days worth of flea-marketing.

لقد تم تجربة المنتج على احجار اللماس صحيحه ١٠٠٪؜ ولم يعطي نتيجه صحيحه كل ذلك اقل بنسبة ٣٠٪؜ وهاذي نسبة تخلي الواحد يتراجع او يفرط في قطعه ١٠٠٪؜ صحيحه والشي الاخر لم تتم اعادة المبلغ الى الان مايقارب ١٤ يوما واكثر ولا زلت انتظر وكل يوم اتصل ولا احد يفيدني

When I received this I tested all my known gemstones, as well as gemstones purchased from eBay. I was not surprised to find that stones that were purchased at a discount price as rubies, tured out to be spinel. I was not surprised because I am fonder of spinel’s brighter magenta colour as opposed to ruby’s pigeon blood. Combine this with a specific gravity scale as your secondary line of testing and you are covered. The manufactuer provides clear instructions for calibration, as well as a small tool for depressing the hidden calibration/reset button under the little rubber cover on the right hand side of the machine. Happy with my purchase, hope it serves me well for years to come.

Muy buen producto funciona de maravilla