shape
carat
color
clarity

FIC table size?

Status
Not open for further replies. Please create a new topic or request for this thread to be opened.

bluefire7

Rough_Rock
Joined
Jan 8, 2010
Messages
15
Hi all, i know that for an FIC, the crown angle needs to be 35.5 and above, but is there a limit to the table percentage? What is the largest a table percentage can maintain in order to still be an fiery ideal, say in a stone with a crown angle of 36%?
 
thanks for the link to the info!
 
Date: 3/4/2010 2:42:39 PM
Author:bluefire7
Hi all, i know that for an FIC, the crown angle needs to be 35.5 and above, but is there a limit to the table percentage? What is the largest a table percentage can maintain in order to still be an fiery ideal, say in a stone with a crown angle of 36%?
Hi bluefire

With FIC's always check the proportions work well together preferably with an Idealscope or image and that the diamond is visually pleasing to you, the effects of a FIC are subtle so see if you can compare one with the more traditional Near Tolkowsky type stone ( TIC) and also a brilliant ideal Cut ( BIC) if you can in order to see which you like best.

http://www.diamond-cut.com.au/23_bicfic.htm
 
thank you lorelai.. i''m comparing the idealscope images but i''m not quite sure if it is indeed an FIC or at least close to it right now. i wish there was a sort of (free) calculator that would let you know after punching in some more numbers. perhaps garry''s next project? haha...
 
Date: 3/5/2010 10:58:30 AM
Author: bluefire7
thank you lorelai.. i'm comparing the idealscope images but i'm not quite sure if it is indeed an FIC or at least close to it right now. i wish there was a sort of (free) calculator that would let you know after punching in some more numbers. perhaps garry's next project? haha...
LOL! The HCA will tell you if the stone falls within FIC/ BIC/ TIC range. The IS images will give you some idea whether there is any light leakage of the stone but the final decision comes down to your own eyes and tastes, also remember that the visual differences between FIC, BIC, TIC are subtle and not something that will jump out at you. If you can get a good return policy then that would give you the opportunity to view it yourself and see if this is the right diamond for you.

Do you have all the proportions so you could post them here?
 
sure, for some reason i can''t upload the idealscope again, so here''s the link to the forum with the posted idealscope-
https://www.pricescope.com/community/threads/what-do-you-think-of-this-diamond.133875/

PROPORTIONS:
table- 56%
depth- 61.9%
crown angle- 36
pav. angle- 40.8

HCA gives it a 3.5, but garry says that after looking at the idealscope, it might be painted ever so slightly as to reduce light leakage. but when i give it a tiny variance with GIA''s rounding figures, it becomes an FIC... and the stone does have a bit more fire than brilliance
 
Lovely stone!



FIC/BIC/TIC.. well, the differences are so slight, and what differences there are are very much based on personal preference. The thing is, an FIC will not have more fire than a BIC or a TIC -in the right light, any diamond will show fire, period. It's just more likely to disperse under a larger array of conditions.


Your stone has skinnier arrows. The width of those arrows directly corresponds to facet size. Larger the facets, larger the virtual facets, so larger the flash that returns to your eyes. Skinny arrows = smaller vfs = smaller, splintery flashes compared to say 70LGF. SO while your high-crown low-pavilion FIC might show more fire in more conditions, it will show splintery fire as opposed to the bold flashes of say an OEC. So - it's always a give-and-take.


I would say focus on the performance of the stone itself, and don't worry so much about trying to match Garry's perfect parametres
2.gif
 
Date: 3/8/2010 1:40:48 PM
Author: bluefire7
sure, for some reason i can''t upload the idealscope again, so here''s the link to the forum with the posted idealscope-
https://www.pricescope.com/community/threads/what-do-you-think-of-this-diamond.133875/

PROPORTIONS:
table- 56%
depth- 61.9%
crown angle- 36
pav. angle- 40.8

HCA gives it a 3.5, but garry says that after looking at the idealscope, it might be painted ever so slightly as to reduce light leakage. but when i give it a tiny variance with GIA''s rounding figures, it becomes an FIC... and the stone does have a bit more fire than brilliance
Yes if you reduce the pavilion angle the stone scores within FIC range. The steeper crown might enhance fire a little, also the IS checks out well so it is a definite contender. Ask one of the gemologists to discuss the stone with you and the various performance nuances, that should give you a better idea.
 
Status
Not open for further replies. Please create a new topic or request for this thread to be opened.
GET 3 FREE HCA RESULTS JOIN THE FORUM. ASK FOR HELP
Top