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 » RockyTalky
»  » internal/surface graining ? & opinion btw 2 stones
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internal/surface graining ? & opinion btw 2 stones |
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| P: 11/3/2003 2:57:55 PM | |
simi Rough Rock Total Posts: 5 Last Post: 11/13/2003 Member Since: 11/3/2003 |
i'm looking at two diamonds from an online vendor. one has internal and surface graining that's listed on the GIA report under additional comments. how wary of this graining should i be? suggestions between these 2 diamonds? Diamond 1 1.04ct-round brilliant 6.59-6.67 x 3.97mm Depth-59.9 Table-59 Girdle-thin to med. Culet- small Polish-VG Symmetry-VG Clarity- VS2 Color-H Flo.-None Price-$5,411 Diamond 2 1.05ct-round brilliant 6.59-6.61 x 3.95mm Depth-59.8 Table-60 Girdle-thin to med. Culet- none Polish-EX Symmetry-VG Clarity- VS1 Color-H Flo.-None Additional comments- Internal/surface graining listed on GIA report Price- $5,225 thanks for the help! |
| Posted: 11/3/2003 2:57:55 PM | |
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There are 3 replies to this message. There are 3 replies on this page. |
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| P: 11/3/2003 4:58:19 PM | |
niceice Ideal Rock Total Posts: 1,792 Last Post: 7/22/2008 Member Since: 1/29/2003 |
It depends on the extent of the internal graining. Here is a picture of internal graining as seen at an extreme level of magnification, the graining actually spirals around within the table facet of the diamond, but is most visible in this one particular vein. The graining was not visible until we blew the diamond up to the size of a soccer ball, so it would never be seen by anybody just using their eyes or even a 10x standard diamond grading loupe. More importantly, what are the crown angle and pavilion angle measurements for the two diamonds that you referenced?
Todd L. Gray, President |
| Posted: 11/3/2003 4:58:19 PM | |
| P: 11/3/2003 5:08:13 PM | |
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simi Rough Rock Total Posts: 5 Last Post: 11/13/2003 Member Since: 11/3/2003 |
thanks for the pic. unfortunately i don't have the crown angle and pavilion (just the GIA report they list on the site). it sounds like the graining isn't a big problem if it's hard to see 10x.
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| Posted: 11/3/2003 5:08:13 PM | |
| P: 11/3/2003 5:13:14 PM | |
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niceice Ideal Rock Total Posts: 1,792 Last Post: 7/22/2008 Member Since: 1/29/2003 |
Ask the seller to provide you with a full page version of the Sarin or OGI computerized proportions analysis so that you can determine the proportions rating of the diamonds you are considering. In terms of price, the proportions of a diamond can result in a price discrepancy of up to 60%! The technology is commonplace in today's market, you should expect it.
Todd L. Gray, President |
| Posted: 11/3/2003 5:13:14 PM | |
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