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 inclusion plotting
P:  7/16/2003 6:25:00 PM  
lucy
lucy

Rough Rock
Total Posts: 55
Last Post: 8/7/2004
Member Since: 6/2/2002
 
 		just wondering-my GIA report only plotted one inclusion, a crystal; on the report-however on GOG's site Jonathan points out three tiny ones in zooms. (thanks for giving MORE info rather than less GOG!) Does the GIA only point out stuff you can see thru a 10x mag or so and anything else there they DONT plot since maybe it would take a higher mag to see it? thnx

 
Posted:  7/16/2003 6:25:00 PM

 There are 2 replies to this message.  There are 2 replies on this page.
P: 7/16/2003 9:58:59 PM
dimonbob
dimonbob

Ideal Rock
Total Posts: 660
Last Post: 10/30/2009
Member Since: 12/13/2000
 
 		GIA only plots inclusions that can be seen at 10x under a binocular microscope with dark-field illumination and an overhead light. They do a search with higher mignification and turn down the power to 10x to plot. If it cannot be seen at 10x it does not get plotted. Those are international rules that the worlds labs agree upon. There has to be a cut off somewhere and they agreed upon 10x. If Rhino wants to take pictures of an inclusion that can only be seen at 20x, that is up to him.

dimonbob, GG
whiteflash.com
Posted:  7/16/2003 9:58:59 PM
P: 7/16/2003 11:22:58 PM
niceice
niceice

Ideal Rock
Total Posts: 1,792
Last Post: 7/22/2008
Member Since: 1/29/2003
 
 		If those of us who provide clarity photographs only did so at 10x magnification, nobody would be able to see anything on-line because of the resolution... So the pictures are usually taken at 40x / 50x / 60x / 70x magnification and thus more of the inclusions within the diamond are visible... As Bob has pointed out, the industry standard for diamond grading is 10x but let's face it, we'd all use higher magnification if it was available because it's so much more cool

Todd L. Gray, President
NiceIce.com
Posted:  7/16/2003 11:22:58 PM

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