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.

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

I love this tester and it's easy to use. I am well aware of how delicate the tester point is, so I am VERY careful with it and keep the tip cover on when not in use. This is a great item to have on hand. You can test all the gems you're unsure about... and do the same for your friends. It comes in a nice case and is easy to store. I had a tester for decades before this one, but it just tested diamonds. This one does so much more and the price is so reasonable. Treated right, you will have it for years and years. AND... it's so easy to use!