It narrows the field down a tad. I use it mostly to check to see if stones I purchase are even remotely what they were said to be. For the stones that I buy this works fairly well. Like many others review have said, this can not be the only testing you do to identify a stone. But if you 90-95% sure of the stone and just want to have that extra 5-10% for peace of mind than this works pretty well.
Bought this for my wife. We rockhunt. She also test jewelry with it. She has a smaller less expensive tester too. likes this one much better. Seems to be accurate, it's easy to use. It may not be something a pro jeweler would want,( i don't know). But for the layperson. 2 thumbs up.
Excellent diamond detector and The reflective index feature is not just a gimmick. It’s actually very helpful.
Pricey, but will pay for itself quickly with colored stone ID
Great product, accurate and easy to use.
This works very well...give it a few reading and it settles into correct calibration. I couldn't be more pleased.
Feature Product
- Retractable thermoelectric probe tip that ensures constant pressure between probe and gemstone
- Industrys thinnest probe tip (0.6mm) for testing gemstones as small as 0.02ct
- Large easy to read analog dial with 15 colored gemstones
- Consistent and reliable results every time
- Simple and easy to use
Description
The only gemological instrument in the industry that tests gemstones using both thermal and reflectivity testing.Presidium Duo Tester (PDT) is the only comprehensive tool on the market that combines two proven testing methods for gemstones. PDT differentiates diamonds from its simulants based on both their thermal conductivity and reflective indexes. Coated gemstones can also be generally tested with the PDT.The Presidium Duo Tester comes with a probe pen that has a retractable probe tip which ensures consistent pressure against the gemstone during testing for more reliable results. With the industrys thinnest probe tip size of 0.6mm, PDT tests gemstones as small as 0.02ct.NOTE: Does not differentiate between natural and synthetic colored gemstones.
works as discribed
Fast service and the product was as decribed, I am satisfied. As with all other instruments, each one tells you a part. My wife likes this Duo Tester better than the refractometer.
The very small ( THIN) POINT makes testing very small stones possible whereas other diamond testers always touch part of the metal setting.Nice tester for most gemstones.
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