First, thank you for your efforts in creating this site.  It is an incredible perspective in a market that is otherwise lacking reason-based analysis accessible to the consumer.  I don’t have a way to validate your methods, but your approach seems very sound.  If you could definitively validate this, it really has the potential to disrupt the entire market.

My question — As a typical consumer, why should I care whether a diamond is GIA certified (as opposed to a lesser lab)?

It seems like I would be using the following info to assess a diamond:

  1. reliable high-quality 3D video of the diamond
  2. diamond’s dimensions (from a lab report)
  3. DiamondScreener’s algorithm results 

If I can make a good assessment based on that, then why would I care which lab created the report?  Who cares if a certain lab is more lax on their cut/quality/color definitions?  In 2019 the diamond’s symmetry/cut/sparkle is visible online (in insane detail) by both myself, as well as your algorithm.  So I would really be disregarding the lab assessment anyway!  Right now even the GIA triple-excellent category gets parsed apart.  So why is it even relevant?

To me, it seems that the GIA was valuable in the pre-internet (and maybe pre-DiamondScreener) era, when otherwise you had to trust a salesman in a store (ie, the information was highly asymmetric between seller and consumer).  In that era, the GIA report was used as assurance that a diamond at least cleared a certain standard. 

But now, it seems that the only thing I’m really getting from that report is the diamond dimensions.  I assume that all labs (GIA or not) report this truthfully – is that accurate? 

Am I missing something?  Or am I witnessing the impending upheaval of an industry?  I’m not trying to be dramatic, just buying a ring for my girl.  But the entire current structure just seems obsolete.

Answered question
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