J jolin Rough_Rock Joined Mar 19, 2013 Messages 37 May 24, 2016 #1 It has a 60.9% depth and 60% table. GIA rated it excellent cut but HCA scored a 4. Any thoughts would be greatly appreciated.
It has a 60.9% depth and 60% table. GIA rated it excellent cut but HCA scored a 4. Any thoughts would be greatly appreciated.
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kenny Super_Ideal_Rock Premium Joined Apr 30, 2005 Messages 31,763 May 24, 2016 #2 jolin|1464109237|4035806 said: It has a 60.9% depth and 60% table. GIA rated it excellent cut but HCA scored a 4. Any thoughts would be greatly appreciated. Click to expand... HCA = 4? I would reject rounds that score over 2.0 on the HCA. Get an Idealscope pic on those that score under 2.0. Round is the most abundant shape so I'd only pick one that does well on all the cut-evalation tools.
jolin|1464109237|4035806 said: It has a 60.9% depth and 60% table. GIA rated it excellent cut but HCA scored a 4. Any thoughts would be greatly appreciated. Click to expand... HCA = 4? I would reject rounds that score over 2.0 on the HCA. Get an Idealscope pic on those that score under 2.0. Round is the most abundant shape so I'd only pick one that does well on all the cut-evalation tools.
diamondseeker2006 Super_Ideal_Rock Premium Joined Jan 11, 2006 Messages 58,342 May 24, 2016 #3 These are measurements to help you stay in ideal cut territory with a GIA excellent cut stone. table: 54-58 depth: 60-62.3 crown angle: 34-35.0 (up to 35.5 crown angle can sometimes work with a 40.6 pav angle) pavilion angle: 40.6-40.9 (sometimes 41.0 if the crown angle is close to 34) So no, that pav angle is out of the acceptable range especially if you are buying without idealscope and ASET images.
These are measurements to help you stay in ideal cut territory with a GIA excellent cut stone. table: 54-58 depth: 60-62.3 crown angle: 34-35.0 (up to 35.5 crown angle can sometimes work with a 40.6 pav angle) pavilion angle: 40.6-40.9 (sometimes 41.0 if the crown angle is close to 34) So no, that pav angle is out of the acceptable range especially if you are buying without idealscope and ASET images.
J jolin Rough_Rock Joined Mar 19, 2013 Messages 37 May 25, 2016 #4 Thanks for the advice. I will pass on this one then.