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 Post subject: Synthetic Diamond Testing
PostPosted: Thu Jun 02, 2016 11:28 am 
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Joined: Fri Feb 05, 2016 11:08 am
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Location: Belleville, IL
What should I use to detect synthetic diamonds? Our lab is interested in acquiring a device to assist us in detection of CVD and HPHT. What is most accurate technology available right now?

I came across the D-secure... http://www.dsecure.com/ Has anyone out there used this device? I imagine the biggest downfall to using this machine is its ability to only be accurate with near colorless to colorless goods. Has anyone out there had any experience using this?

Thank you for your time. Looking forward to your thoughts.


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 Post subject: Re: Synthetic Diamond Testing
PostPosted: Thu Jun 02, 2016 12:43 pm 
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Joined: Fri May 12, 2006 11:24 am
Posts: 7523
Location: Rome, Italy
hi,
i will not comment a machine i have never tested BUT, i would never put the credibility of my lab regarding id of BOTH HPHT and CVD synth diamonds on one machine only..... no way.
it is a free advice you can follow or not..... :wink:
btw, which other instruments you use to solve the issue that would need the "assistance" of this unit?

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 Post subject: Re: Synthetic Diamond Testing
PostPosted: Thu Jun 02, 2016 12:57 pm 
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Location: Belleville, IL
Alberto,

Thank you for your reply. As of right now, the only tools we have are our eyes, darkfield trinocular amscope microscopes, polariscope, refractometer, UV light box. We do not have anything to assist us in detecting synthetic diamonds yet. We have always submitted to GIA for that service


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 Post subject: Re: Synthetic Diamond Testing
PostPosted: Thu Jun 02, 2016 8:50 pm 
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Joined: Fri May 12, 2006 11:24 am
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Location: Rome, Italy
Jake,

Synthetic diamond is a tough call. Although the issue is relatively easy to solve from the "screening" point of view by using SWUV transparence, proper ID requires a number of spectroscopy techniques as UV-Vis-NIR, Photoluminescence (possibly more than a single wavelength), FTIR and Fluorescence Microscopy. I really do not think the answer is in the fancy white unit described in the link u posted but, i could be easily wrong.

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 Post subject: Re: Synthetic Diamond Testing
PostPosted: Fri Jun 03, 2016 9:12 am 
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Location: Belleville, IL
Alberto,
In your opinion. what equipment would a beginning gemological lab need to identify such material? Or, to "screen" such candidates to be able to mark them necessary for further testing.

What instrumentation should I recommend building into our lab to either decrease liability against mis-identifying these stones, or to be able to identify outright. Of course I would prefer to be able to identify accurately. I also do not think that the Dsecure machine is the right answer to this question.

Looking forward to your thoughts


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 Post subject: Re: Synthetic Diamond Testing
PostPosted: Sat Jun 04, 2016 3:15 am 
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Joined: Fri May 12, 2006 11:24 am
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Location: Rome, Italy
Hi,
Traveling in the far east actually, coming home in few days, ill see if i can elaborate a decent reply to ur questions asap..

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