January 24 Through February 4—TUCSON, ARIZONA: Annual show
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 Post subject: GIA's new diamond screening device
PostPosted: Tue Jun 20, 2017 3:23 pm 
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GIA Gem Testing Device*

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GIA has developed an easy-to-operate, sophisticated desktop diamond testing device to reliably identify mounted and unmounted natural diamonds. The new instrument will refer all potential synthetic diamonds – HPHT and CVD – and simulants; none will be passed as natural diamonds. With this device, there is absolute certainty that any diamond passed is a natural stone. See a working prototype and hear about this exceptional instrument.
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Reserve a unit at a discounted show price of $3,995 USD at the seminar or booth with a $500 USD deposit (per device).

*.Patent Pending


Alberto, Mikko will you be at this show? I would love your review on this product.
Wait....rereading this, there seems to be no difference between this unit and others which indicate "natural diamond" or Further Testing Needed.

Am I missing something?


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 Post subject: Re: GIA's new damond screening device
PostPosted: Wed Jun 21, 2017 10:24 am 
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there is no other info currently available than what you are posting, Barbra.
the claim itself "...none will be passed as natural diamonds... " is valid even for the cheap screening units working on the SWUV principle. Of course i guess this unit operates in a totally different way, very likely we have followed the same path but, in any case, the success and reliability of these screen units depends largely by the % of "refer to further testing", operational speed AND the possibility of working on mounted pieces...... ;-)

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 Post subject: Re: GIA's new damond screening device
PostPosted: Wed Jun 21, 2017 2:56 pm 
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Agreed. It seems as though this new GIA device only has the capabilities of the $599 Presidium diamond tester.


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 Post subject: Re: GIA's new damond screening device
PostPosted: Wed Jun 21, 2017 3:11 pm 
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Barbra Voltaire wrote:
Agreed. It seems as though this new GIA device only has the capabilities of the $599 Presidium diamond tester.


Uhm, well, maybe not. Likely the number of "refer for further test" will be smaller but we will know only when the unit will be on the market....

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 Post subject: Re: GIA's new damond screening device
PostPosted: Wed Jun 21, 2017 3:54 pm 
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Agree with Alberto, to evaluate performance, positive signal detection principle must be taken into account:
- all transparency testers based on the principle of UV transparency, if the stone is UV opaque than it is natural, it creates the situation, to fake device, stones must be UV opaque, what could be done with the coating, our most of the imitation will give a false reading, to make reverse is impossible: opaque stone transparent - so, in fact, analytical signal proofs than rejected stone could be synthetic, natural II type or Ib type diamond, but accepted - natural Ia, coated synthetic or imitation;
- phosphorescence testers (HPHT synthetic diamonds) - capable of identifying HPHT synthetic stones, all other could be CVD, natural or any imitation, positive signal (phosphorescence) is proof of HPHT synthetic;
- positive signal principle testers (MAGI EXA and, possible, GIA): detection based on natural diamond property, what is characteristic only for almost all natural diamonds (99+%), the signal is only possible for any type of natural diamonds (there is no possibility to fake it with any method). Probe principle gives the possibility to test set stones, small size stone and much more... in the case of MAGI: it based on microcomputer: software could be updated and it gives future flexibility.
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