#Igi vs gia reddit how to
To tell you the truth, I’m not completely sure how to interpret the GIA observations. Yellow HPHT is the same price as blue HPHT, so I recommend yellow over blue unless unless there’s a stated preference for blue. A yellow hue is most similar to the typical natural diamond. not raise any questions about whether it’s lab or natural). I shy away from blue because I think most people who buy a lab diamond want it to look similar to a natural diamond (i.e. I don’t shy away from blue because I think they’re overgraded for color. Should you use saturation only or saturation+lightness and which one is a better model that matches human perception of diamond color? Interesting topic, but beyond my knowledge. This is somewhat beyond my knowledge of color spaces and the algorithms used for automated color grading by something like the Sarine machines. That stands in contrast to what is being said in the video you’ve linked arond 28:30 in, where GCAL says that they’re looking at saturation only. So my interpretation was that “overall depth of color” should account for saturation+lightness as opposed to saturation alone when the hue is different. On page 8, they say that colors show their strongest saturations at different lightness levels.
#Igi vs gia reddit pdf
On pages 8-10 of the PDF (pages 5-7 by page number) they show various examples in the HSL color space. Perhaps I should have also quoted the preceding sentence in the GIA report: “When doing so, the observer must remember to assess the overall depth of color- the combined effect of tone (lightness to darkness) and saturation (strength or weakness) of a color (KingĮt al., 1994).” That is consistent with the GIA fancy color description ( ).
A G color can look lovely in a two-tone setting (that's what it's called when the band is yellow but the prongs are white), but you may decide it's worth the slight premium to go with colorless (F).Thank you for linking these videos – I will be sure to make my way through the series. In regards to which is better F or G, some people are very sensitive to color and others cannot tell the difference at all. it will have a cost (shipping alone can be expensive!), and 2. You can always send a lab diamond to GIA for secondary grading but keep in mind that 1. To give you some more insight, the vast majority of GIA-graded diamonds I've personally seen in that size range are D or E color, because growers have to weigh the cost benefit analysis of getting a GIA grade relative to how much they can sell the diamond for. That is because GIA reports are more expensive than IGI and the timelines much longer for grading (this is likely a temporary phenomenon related to COVID-19 but we recently waited 5 weeks to have a single stone graded a second time by GIA). While there are some GIA-certified lab diamond rounds of FG color in that size range, there will not be a lot of inventory out there. There are some exceptions on both sides, but you should consider them relatively equal. Since you linked to my post I'll chime in! I would say overall GIA and IGI grade lab diamonds about the same.
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