tberube
Brilliant_Rock
- Joined
- Oct 22, 2007
- Messages
- 1,999
Date: 2/28/2008 11:53:35 AM
Author: strmrdr
as you can see in this aset image the large virtual facets produce large areas of light return and large areas of obstruction and leakage(red, green is light return, blue is obstruction, black leakage) while the small and med virtual facets return smaller chunks.
The lack of smaller chunks is one of the factors that give large tabled ascchers and EC less fire.
Some will get fire from the high crown if they have one. (there is another factor and that is the vertical size of the higher crown facets as the stone is moved creating new virtual facets not seen face up that is a huge factor also)
so in summery a much simplified view of fire and scint in asschers and EC is 3 factors:
1: size of and number of virtual facets face up
2: bending light
3: virtual facets created by the crown facets as it is tilted.
fascinating! Thanks for all the info, storm!! Once again...!
